alt.hn

4/23/2026 at 5:01:01 PM

'Hairdryer used to trick weather sensor' to win Polymarket bet

 https://www.telegraph.co.uk/business/2026/04/23/hairdryer-used-trick-weather-sensor-34000-polymarket-bet/

by zdw

4/23/2026 at 6:11:34 PM

This is small potatoes compared to the rain gauge tampering farmers were doing in Colorado. There was a recent conviction for $6.5 million dollars of fraud against the federal crop insurance program!

https://www.justice.gov/usao-co/pr/two-southeastern-colorado...

by dzdt

4/23/2026 at 6:24:04 PM

Small, shriveled, drought-stricken, dessicated potatoes.

by LeifCarrotson

4/23/2026 at 6:15:52 PM

People have no idea how pervasive this is globally.

by jandrewrogers

4/23/2026 at 7:41:47 PM

If it exists, and money can flow, it will be gamed.

by bombcar

4/23/2026 at 7:50:19 PM

We should have much stricter penalties for fraud. Vastly more money is stolen this way than by petty theft or robbery, but the perpetrators tend to get off very lightly by comparison.

by anigbrowl

4/23/2026 at 9:04:05 PM

Wage theft is the largest form of theft by a wide margin. Everything from not paying people at all for contracted work, forcing people to work overtime without additional pay, structuring contracts/agreements in terms of bonuses that can never be attained with the insane performance requirements, to paying people late.

by abdullahkhalids

4/23/2026 at 7:58:05 PM

It's an offset for the amount of effort and forethought put into the fraud

by cbluth

4/23/2026 at 8:25:46 PM

What's an offset? The money stolen from other people? I can't understand what you mean

by RugnirViking

4/23/2026 at 8:52:16 PM

well the bravery for robbing a bank deserves some respect, not jail time

sexual assulters deserve respect due to their manliness and will-to-action

hmm can't see what's wrong here? well that's your intelligence level

by sysguest

4/24/2026 at 7:58:43 AM

Remember DOGE?

Yeah. Good luck!

by dzhiurgis

4/23/2026 at 5:24:24 PM

> There are no indications so far that the successful punters have had to return their winnings. However, the data source for Paris’s hottest temperature has since moved to a sensor at the smaller Paris-Le Bourget airport.

Here's the negative externality that no one will care about. There's no reason gamblers won't repeat this stunt, until us poor schmucks who just want an accurate temperature reading have to build a fortified compound in order to do so.

by ambicapter

4/23/2026 at 6:13:41 PM

This is an existing problem with physical world sensing. Some data models are already heavily polluted by people manipulating observations for various purposes. Most people who rely on those measurements are just collateral damage. Prediction markets provide yet another incentive. It is far more difficult to reliably get at "ground truth" than I think people imagine.

Unlike computing systems, the physical world is a shared mutable environment. It is effectively impossible to lock people out so that you can get a reliable, clean measurement even when people are not intentionally sabotaging the data model.

There are ways to robustly clean this up analytically but it is largely beyond the capabilities of current tech stacks.

by jandrewrogers

4/23/2026 at 6:29:03 PM

Manipulation of datasets is something that already existed, yes. But what betting markets do is create more incentives to screw with the real world.

You're right that this isn't a technical problem, it's a social one. This is why most sports leagues simply banned betting... until recently, now that gambling companies have bought their way in. The players always end up manipulating games.

by dymk

4/23/2026 at 6:34:32 PM

> There are ways to robustly clean this up analytically but it is largely beyond the capabilities of current tech stacks.

Can you expand on that? Even just conceptually that sounds really hard, how would you know whether you're measuring genuine (unexpected) changes in the environment rather than the result of (possibly sophisticated and coordinated) deliberate manipulation?

by AgentMatt

4/23/2026 at 7:37:55 PM

If you don't trust your measurements, and you shouldn't because all physical world measurements are proxies, the alternative is to find several unrelated and redundant proxies for "ground truth" and have them corroborate and correct each other. There is a lot of errors, bugs, noise, idiosyncratic behavior, etc degrading the data even ignoring intentional manipulation so you really should be doing this anyway.

Stitching unrelated proxies and sensing modalities into a coherent data model is a spatiotemporal graph reconstruction problem. The join predicates require non-trivial inference algorithms if you want to avoid being buried in false positives. From this you can derive an estimate of ground truth and a model of uncertainty at a point in space and time.

The model of uncertainty is dynamic and unpredictable. It is difficult to manipulate the measurement without producing data that falls outside the uncertainty model across every proxy by which someone might construct that uncertainty model. This is similar to how e.g. GPS spoofing is detected in military systems. All GPS updates must fit within a (classified) dynamic uncertainty model relative to INS; if an update falls outside the model then the GPS signal is presumed compromised and updates ignored.

At the limit, this restricts manipulation to values within the uncertainty model. If you have a lot of unrelated proxies, you can make the window of uncertainty tight enough that manipulation becomes effectively impossible. At a minimum, the adversary would need to be able to manipulate every proxy and modality feeding your uncertainty model simultaneously.

These graph, spatial, and spatiotemporal algorithms scale very poorly on traditional data infrastructure and these data models easily run into petabytes if you are stacking multiple independent data sources.

by jandrewrogers

4/23/2026 at 10:22:36 PM

I recommend for you to read Feyerabend's Science in a Free Society.

by uoaei

4/24/2026 at 12:21:52 AM

I'm not sure I see the relevance?

by jandrewrogers

4/24/2026 at 1:23:53 AM

Yours is a rather pedestrian dorm-room take on epistemology and relevance of the moral dimension to social progress whose flaws are addressed in longform by Feyerabend.

by uoaei

4/24/2026 at 3:40:52 AM

What a bizarre response.

I was relaying the technical details of working in these data environments based on deep, real-world operational experience in the domain. There is no "moral dimension" to it, I was describing the world as it exists.

Does Feyerabend also have an opinion on compiler flags and sorting algorithms?

by jandrewrogers

4/24/2026 at 9:38:35 AM

There is a moral dimension, you're just choosing not to acknowledge it.

Feyerabend speaks to things that add context and nuance to the effects, consequences, and provisions of the things you've felt comfortable discussing so far.

Hence the recommendation. Your awareness could use some expanding, if I may be so blunt.

by uoaei

4/23/2026 at 6:28:29 PM

"Some data models are already heavily polluted by people manipulating observations for various purposes"

Example of this?

by pavl-

4/23/2026 at 6:31:20 PM

that argument is insane

by functionmouse

4/23/2026 at 9:50:02 PM

> for various purposes.

What kinds of purposes?

by ambicapter

4/24/2026 at 12:42:35 AM

Typical ones in no particular order: fraud; obscuring crime, espionage, or covert activity; manipulating your competitors or markets; skirting regulations. Quite a lot of low-level organized crime.

A lot of it is transnational and many countries are complicit so there is relatively little you can do to stop it. If you use data at risk of this then systems have to be designed under the assumption that it is going to happen. It has spread and become worse over time.

It is a bit like FinCEN data in that if you work with it long enough you'll see a lot more going on in it than it is your job to notice.

by jandrewrogers

4/23/2026 at 6:52:06 PM

Re externalities, don't they use the temperature to calculate the length of the takeoff roll and other stuff about the flight, fuel load, etc? Maybe they use the plane's own temperature sensors for that though.

by tedd4u

4/23/2026 at 7:18:15 PM

The airport needs to know that by themselves as well because it's part of METAR

Now imagine we're can't have this basic resource anymore because some nerd fuckr needs to win a bet on the internet

Makes me want to bet on creative uses of a baseball bat

by raverbashing

4/23/2026 at 5:27:33 PM

>There's no reason gamblers won't repeat this stunt, until us poor schmucks who just want an accurate temperature reading have to build a fortified compound in order to do so.

The issue here is you'd need a lot more land because any asphalt near a temp sensor is going to give you bad data.

by AustinDev

4/23/2026 at 6:33:24 PM

Thats just not true. Generally you want to place a sensor 5 feet away from any structure. That's not a lot of land

by malfist

4/23/2026 at 5:47:48 PM

What do you think taxiways are made of? Or parking lots?

by naikrovek

4/23/2026 at 6:35:22 PM

> The issue here is you'd need a lot more land because any asphalt near a temp sensor is going to give you bad data.

Ah yes. The way to measure temperature in the city is to move the thermometers outside of the city. Makes perfect sense.

by sixothree

4/23/2026 at 5:59:39 PM

But why are they only using one sensor?

by j-bos

4/23/2026 at 6:00:52 PM

Because we used to be a high trust society where degenrate gamblers wouldnt mess with scientific equipment to rip each other off

by samrus

4/23/2026 at 7:31:02 PM

I hear what you're saying man, but honestly it's a sensor. Sensors can fail all the time even without deliberate tampering. It doesn't seem to really make sense to have a single one in a single location. Besides for clarity, my question was more why was the market referenced on a single sensor rather than on multiple sensors?

by j-bos

4/23/2026 at 6:30:20 PM

lol, the OP is such a classic HN take. "Why doesn't society simply absorb a negative externality created by gambling and add high cost redundancy layers that are otherwise useless" - Not every problem is technical.

by pavl-

4/23/2026 at 6:41:45 PM

To be more generous, it is the action that can be taken unilaterally.

Trying to eliminate gambling has vexed many an emperor and cleric.

by MattGaiser

4/23/2026 at 8:34:41 PM

I'm sorry, what is this "high trust" society of which you speak?

by jrm4

4/23/2026 at 6:28:52 PM

Counterpoint, why are we measuring temperature on what is basically a giant radiator?

by slackfan

4/23/2026 at 6:29:46 PM

Because that wasn't what caused the problem? The reason it didn't work was some asshole intentionally tampered with the equipment, not because of where it was.

by dymk

4/23/2026 at 10:11:06 PM

Counterpoint - that thermometer is used for important temperature & climate data.

by slackfan

4/23/2026 at 6:39:40 PM

Counter-counterpoint, why are people wagering on an airport thermometer measurement?

by gorjusborg

4/23/2026 at 7:22:24 PM

It's a catch-22: I already gambled the coin I was going to use for the heads-or-tails bet.

by wcfields

4/23/2026 at 6:20:04 PM

I am a bit surprised by that for a scientific application where you want high accuracy reading. Temperature sensors has a error margin, and I think they can also drift a bit.

In a bit of expensive equipment I own it happens to have 4 temperature and pressure sensors, located in two different locations on the unit. All of them generally disagree with each other on the exact temperature by around 0.1 C, which is fine for my use of it.

by belorn

4/24/2026 at 8:09:15 AM

Probably would make sense for polymarket, but otherwise you get things like “mothers on average have 1.9 babies”

by dzhiurgis

4/23/2026 at 6:03:19 PM

Why didn't you put two locks on your door? Clearly you deserved to get burgled if you only used one.

Building Byzantine fault tolerance into absolutely everything is expensive, and makes everything we do and buy more expensive. It would be better and cheaper to rely on social trust, if that's possible-- and it was possible before these gambling sites. Prediction markets are burning social trust as fuel to make profit, they should be heavily taxed, the way polluters are taxed, as destroyers of the commons.

by Analemma_

4/23/2026 at 6:11:46 PM

Prediction markets and all the market manipulation are the symptom, not the cause. Our society used to have real consequences for breaching public trust, but with our mere decades old "money is speech" legal system, there have not been any consequences for moneyed interest in quite a while. And as long as there are no consequences, they keep trying more and more egregious violations of public trust to establish where the new red line (if any) actually are.

by jgeada

4/23/2026 at 6:47:12 PM

Money is speech - but speech isn't speech. What's the latest thing a US citizen said in the US that got them arrested? They said in a private WhatsApp group that Benjamin Netanyahu should come and bomb their school to get them out of an exam. Benjamin Netanyahu was not in the group chat, but they got arrested anyway.

by pocksuppet

4/23/2026 at 6:28:48 PM

>Why didn't you put two locks on your door? Clearly you deserved to get burgled if you only used one.

I can reasonably test that the bolt is in a locked position every time I close the door and turn handle on the lock. But a single remote sensor could have malfunctioned or simply be out of calibration a few degrees.

If the actual temperature at the airport is important to any set of users enough so that the difference between it being 18 or 22 deg C is relevant, one should expect that there be at least 3 sensors (much like clocks) and assuming variances between the 3 sensors are within tolerance an average of the 3 temperatures is taken.

by dessimus

4/23/2026 at 6:56:49 PM

> If the actual temperature at the airport is important to any set of users enough so that the difference between it being 18 or 22 deg C is relevant, one should expect that there be at least 3 sensors

Three sensors doesn't solve the problem. Manipulating becomes marginally more difficult with three sensors, but it's still very possible, and with enough monetary incentive it's still even likely that it happens again.

So why not 5 sensors? How about 10?

And what about more consequential issues like the toppling of governments or military blockades where true redundancy is impossible and people are actually harmed?

Is there not a point where you start to blame the incentives that are being chased?

by drtz

4/23/2026 at 6:47:58 PM

It's not like there aren't literally hundreds of sensors across the city.

by sixothree

4/23/2026 at 6:52:29 PM

Yes we've got to stop this. Meanwhile dictators are laughing at us while our totally free "thus, awesome" society kills itself.

by amelius

4/24/2026 at 1:45:45 AM

I got an ecowitt on a pole in my backyard. I should be safe for awhile.

by nickthegreek

4/23/2026 at 5:44:06 PM

Usually the TOS of these betting markets prohibits tampering. IIRC, someone bet on a streaker at the super bowl, did the streaking themselves, made 6-figures on the bet, bragged about it publicly, and the market negated the bet and recovered the money.

by ortusdux

4/23/2026 at 8:06:58 PM

There are also plenty of cases where something like this has happened, and the prediction market paid out and did nothing.

Ultimately they don't care too much about this kind of tampering, except when it has the potential to damage their reputation. They otherwise don't care about the specific outcome of a bet; they make their money regardless.

by kelnos

4/23/2026 at 6:40:47 PM

So if he had paid someone to streak he would have gotten away with it though.

We are only seeing the very dumb here.

by MattGaiser

4/23/2026 at 5:46:01 PM

> IRC, the TOS of these betting markets prohibits tampering.

Good luck proving it.

> IIRC, someone bet on a streaker at the super bowl, did the streaking themselves, made 6-figures on the bet, bragged about it publicly, and the market negated the bet and recovered the money.

Yeah, exactly. Far easier to prove and to even get the idea to investigate that person in the first place.

by mschuster91

4/23/2026 at 6:14:49 PM

The markets make their own TOS and define the burden of proof needed to overturn a bet. They don't want tampering to risk their cash cow, so I'd imagine they are going to be proactive.

by ortusdux

4/23/2026 at 6:21:53 PM

They don't want the appearance of tampering. They don't really care about tampering itself because they make their money either way.

So as long as you are subtle about it they won't even investigate, as a public investigation would make it seem like tampering was common.

by IX-103

4/23/2026 at 6:41:23 PM

I'll tell you another thing that will risk their cash cow - a reputation for not paying out when gamblers win big, because of vague and specious accusations of fraud (which the gambler denies)

by michaelt

4/23/2026 at 6:42:19 PM

So the "negative" externality is that the data you value has been forced to now be higher quality/reliable? From your perspective, isn't the result a positive?

by thegrim33

4/23/2026 at 6:46:18 PM

I'm guessing the point was that the data was already high quality and reliable until these legalized prediction markets introduced perverse incentives to manipulate it.

by petcat

4/23/2026 at 6:46:31 PM

No the negative externality here is that we've derived a value directly to this data, thereby negatively incentivizing this poor behavior. To further elucidate, it effectively introduces a cat-and-mouse game for the people who actually care about the data itself, they now have to worry about nonsensical third party behavior.

by Ethee

4/23/2026 at 6:44:10 PM

How can you know the data is higher quality?

In my city, the airport has wildly different weather than the city center, and the data I get has no relation to what I experience, for example.

by bayindirh

4/23/2026 at 6:45:55 PM

Only if you refuse to acknowledge the deleterious effects on society from ruining any notion of trust.

Being held hostage by bad actors until you fortify your defenses seems to be a very unnecessary technical solution to an easily predicted social one.

Normalizing this only means the subterfuge becomes more subtle, not that you remove it entirely. But you preserve the incentives by not changing this system. So you're spending a lot of resources wastefully when you could just... not.

by uoaei

4/23/2026 at 5:36:19 PM

You could just sue, but usually gambling is already illegal in most jurisdictions unless licensed in the location.

by behringer

4/23/2026 at 6:31:54 PM

Not in the US anymore. Polymarket etc are all de-facto gambling (unless you're insider trading), and the US government isn't doing anything about it.

by dymk

4/23/2026 at 5:28:14 PM

I mean, there are plenty of negative externalities that this type of gambling brings that are much worse, but at least in this case it does appear that authorities are investigating. At the very least I would expect some law to be broken if interfering with official weather data collection at an active airport.

by hrimfaxi

4/23/2026 at 5:36:08 PM

I agree, but the fact that authorities even have to spend time investigating is a massive negative externality.

A few years years ago, there was no conceivable profit motive for interfering with weather sensors on public property. Now there is one.

by dlenski

4/23/2026 at 6:35:50 PM

> A few years years ago, there was no conceivable profit motive for interfering with weather sensors on public property.

I have bad news for you. The manipulation of weather sensors for profit has a history that long pre-dates prediction markets. You just weren't paying attention until now.

by jandrewrogers

4/23/2026 at 6:49:02 PM

> The manipulation of weather sensors for profit has a history that long pre-dates prediction markets.

Okay, I'm intrigued about what I've missed. Give me more information about this history, please.

by dlenski

4/24/2026 at 12:57:50 AM

Example, some countries have laws about operating factories or construction sites in when the outside temperature is too high. So they have artificial underreported those for decades.

by IcyWindows

4/24/2026 at 2:04:59 AM

Yeah, I'm aware of warehouses that underreport their interior temperatures so that they don't have to give their employees adequate ventilation and breaks. Amazon in particular.

It's really bad, but it's not quite the same society-pervading incentive for data manipulation.

by dlenski

4/23/2026 at 5:45:46 PM

This is the definitive argument for me against prediction markets. It creates incentives to do really dumb shit.

by olelele

4/23/2026 at 5:49:30 PM

Yep. Feels like we see new depressingly creative examples of this every few days.

by dlenski

4/23/2026 at 7:47:25 PM

The more money gets into it the worse it will get. I really am disappointed by how the world has developed in the last 30 years..

by olelele

4/23/2026 at 6:24:42 PM

> A few years years ago, there was no conceivable profit motive for interfering with weather sensors on public property. Now there is one.

Can this really be said with a straight face?

Suppose you're an oil company, or a trader with a large position, and "hottest year on record ten years in a row" is bad PR that will make bills you don't like more likely to get passed. Or for that matter a company selling carbon capture stuff who wants to make sure it goes the other way. How about tobacco companies?

This has been a huge problem for as long as public data has been used to make decisions affecting profits.

by AnthonyMouse

4/23/2026 at 6:47:13 PM

> Your argument is that people had no existing profit motive to use dirty tricks to influence scientific results/data?

No, that's way too broad. I don't believe that, and I didn't write that.

Oil companies indeed had enormous incentives to obscure and confuse the scientific record of climate change. But hiring thousands of Taskrabbits to go around the world blowing hot and/or cold air on weather sensors would not have helped them: some of them would have been caught, and it would've been exposed as a hamfisted and shambolic scandal.

Oil companies had to do larger-scale, longer-term stuff like funding think tanks, lobbying politicians, and writing op-eds.

Now, because of prediction markets, the "attack surface" for interfering with scientific data collection is much larger and more fine-grained. The incentives for big oil companies probably haven't changed much… but now any random amoral idiot or degenerate gambler has an incentive to go find unguarded weather stations or water quality monitors, etc, and mess with them.

by dlenski

4/23/2026 at 7:16:42 PM

> some of them would have been caught, and it would've been exposed as a hamfisted and shambolic scandal.

Isn't that the same thing that happened here? It's a news story because they got caught. There is apparently already a law against this sort of tampering and it makes sense to have that law.

> Now, because of prediction markets, the "attack surface" for interfering with scientific data collection is much larger and more fine-grained.

Oil and tobacco companies are the canonical examples because they're huge and contemptible, but the incentives scale all the way down. A small industrial plant is only allowed to use river water for cooling as long as the temperature isn't too high, they now have the incentive to cause the reading to be lower. The local school doesn't have A/C and therefore cancels class whenever the outside temperature is above some threshold, what happens when the kids figure out that the temperature sensor they use is in a public place?

You can make messing with the sensor illegal to apply a disincentive to counter the incentive but that doesn't mean the incentive wasn't always there to begin with.

by AnthonyMouse

4/24/2026 at 1:04:10 AM

It's now that poorer, less powerful, were caught. I'm sure it's been caught before, but buried.

by IcyWindows

4/23/2026 at 5:32:27 PM

Just wait until they start killing people to win bets.

It's going to happen.

It'll happy by proxy too. When they figure 90% of Tesla's or SpaceX's valuation is tied to Elon, suddenly he becomes your mark.

by echelon

4/23/2026 at 5:47:09 PM

The total open interest of all major prediction markets is barely over a billion dollars. (1) That's the total amount of money currently wagered on ALL contracts across all platforms.

There are roughly 2,500 individual companies listed in the US alone with a market cap that exceeds 1 billion dollars. Tesla's market cap is 1.4 trillion - about 1,000 times the size of all prediction markets put together.

In other words, to the extent this incentive is of societal concern, it is not because of prediction markets - that is the tail wagging the dog.

Edit: to be clear I think these markets are a scourge as they currently operate, but not for this reason.

(1) https://predik.io/en/blog/open-interest-mercados-prediccion-...

by peterbonney

4/23/2026 at 5:54:34 PM

Assassination markets where being discussed back in the 1990s.[1] I think it's been pretty clear for a while that "prediction" markets were going to arrive at the same place.

1. https://en.wikipedia.org/wiki/Assassination_market

by GolfPopper

4/23/2026 at 5:52:02 PM

This hypothetical situation had existed since the dawn of capital markets, or at least since the dawn of short selling. I don’t think we’ve ever seen anyone get assassinated to make a short bet pay off though.

by jsw97

4/23/2026 at 6:55:42 PM

And there is an obvious reason for this. Murder is very illegal. You therefore don't need short selling to be illegal because if someone sells short without killing anyone then that's fine, and if they do assassinate someone then you don't need to be able to charge them with short selling because you can charge them with murder.

Notice also that the murder (or tampering with sensors etc.) is the thing you don't want happening in your jurisdiction, so that's the thing you have to prohibit anyway, because even if you ban short selling or prediction markets in your jurisdiction, having them in any other jurisdiction in the world would allow anyone to just place their bet there and you're right back to needing to deter that by punishing the murder rather than the bet.

by AnthonyMouse

4/23/2026 at 5:41:17 PM

In a sense, that's already happened. https://www.reuters.com/world/middle-east/kalshi-sued-over-o... and https://www.theguardian.com/world/2026/apr/18/iran-war-bets-...

> Later, a single user would make over $550,000 after betting that Ayatollah Ali Khamenei would topple, just moments before his assassination by Israeli forces.

by ipython

4/23/2026 at 5:48:45 PM

It hasn't happened in this case. Your example has causality reversed. Khamenei wasn't killed because there was a prediction market about the political leadership of Iran.

by ianferrel

4/23/2026 at 7:03:32 PM

It is interesting, though, that a large bet was placed not long before the assassination attempt that paid out $550k. By definition, killing the leader does imply that they are no longer the political leader of the country.

It is entirely possible that there was causality in the forward direction if the bettor had inside information about the assassination operation beforehand.

by ipython

4/23/2026 at 8:23:16 PM

Inside information is not the same as causing the outcome.

I knew my previous employer was getting acquired before the markets did -- I had inside information -- but I had no way to make the deal go through.

Revealing inside information through prediction markets is mostly fine. You may think people shouldn't need a financial incentive to do so but clearly they do, and clearly other people are willing to put up with that money for it.

by kqr

4/23/2026 at 6:48:25 PM

On the other hand, given the regime’s desire to keep internal communications secret, maybe the causality does stem from the bet.

by dhosek

4/23/2026 at 7:54:19 PM

How do you know?

by anigbrowl

4/23/2026 at 5:47:25 PM

Don’t even need a gambling marketplace for that - could already put a massive short on TSLA and have a pop at Elon if you were so motivated.

by gizajob

4/23/2026 at 5:56:03 PM

I don't think you even need to attack anybody to do this. Just have an AI media package ready for the top-N CEOs, and wait for any incident involving their name and "injured", "hospital", "attacked", etc. Then short the stock, go to social media and show the CEO being transported in an ambulance, or a gurney with a sheet over it, "X still missing", whatever.

Probably automatable, and simply counting on automated systems and panic selling. Might be possible just with the AI package these days (not even requiring a traditional media article).

by avidiax

4/23/2026 at 6:10:03 PM

That has proven not to be the case with sports betting. Otherwise every major league pitcher would be needing armed guards to stop all the people with pipes trying to disable them. Seems there is at least some morality to not harm people but no issue in harming temperature sensors so where is the split line? Some really annoying ones like trains being on time can impact thousands yet i could see someone stepping out on tracks to make a train break to delay it to win a bet

by clifdweller

4/23/2026 at 6:16:17 PM

> That has proven not to be the case with sports betting. Otherwise every major league pitcher would be needing armed guards to stop all the people with pipes trying to disable them.

This is a ridiculously over-broad claim.

First of all, prediction markets shift incentives in a pernicious way; they don't magically erase or override all pre-existing incentive structures.

And secondly, professional athletes of all stripes appear to be receiving a lot more threats of violence from gamblers (including "prediction market traders") than they were a few years ago.

by dlenski

4/23/2026 at 6:53:11 PM

In fact sports bodies are complaining of exactly that being the case, and in much more obscure leagues than Major League Baseball (whose pitchers are presumably accustomed to, and compensated for, the hazards of celebrity):

'Decapitated bodies, death threats, that's our daily life': Tennis players, helpless targets of angry gamblers [ https://www.lemonde.fr/en/france/article/2025/12/08/decapita... ]

https://www.wtatennis.com/news/4288181/wta-and-itf-release-a...

When the vice industry kept gamblers mainly confined to their own community, it was ugly enough (see the “people with pipes” debt collection trope you refer to). I don’t care too much about how people get their jollies. But I don’t see much good in letting vice behaviors and motivations slop out onto the wider world uninvited.

To your question, then: I’d draw the moral line at “don’t base forecasting gambles on any indicator produced by someone who didn’t agree to be used that way.” If I—as the entity or constituency who incurs the cost to produce an indicator—want to hire the prediction market to run bets on it at arms’ length from me, fine. If not, no.

The burden should be on the gambling interests to prove they’re contributing value to a specific domain, not on everyone else in every domain to prove gambling’s specific negative externalities.

by alwa

4/23/2026 at 5:37:20 PM

Not sure that he has done wonders for Tesla sales over the last few years, and he collected enemies quicker than most.

by lostlogin

4/23/2026 at 6:54:52 PM

It's fine. People quickly forget the "bad stuff".

by sixothree

4/23/2026 at 5:37:47 PM

> Just wait until they start killing people to win bets.

Quite likely it has already happened.

There's been an enormous amount of betting on various military strikes by the Trump administration, much of which looks like insider trading.

Almost certainly there have been insiders with money on the line who were financially motivated to launch lethal attacks, which they might have otherwise paused or delayed.

by dlenski

4/23/2026 at 6:01:27 PM

Why almost certainly?

It's much more effective to make the decision first and the bet second.

by Dylan16807

4/23/2026 at 6:11:57 PM

Sure, but then what if in the several hours before the decision is executed, new information comes in?

Your decision maker is now going to make decisions differently than they would if they hadn’t made the bet, due to the financial incentive. It hopefully won’t be blatant, but they’re going to be more committed to the original decision.

by e28eta

4/23/2026 at 6:09:31 PM

> It's much more effective to make the decision first and the bet second.

What did I say that contradicts this?

> Why almost certainly?

Because I haven't seen any clear reporting with evidence documented down to the level of individual decision-making.

by dlenski

4/23/2026 at 6:17:26 PM

> What did I say that contradicts this?

I'm pointing out that the version where the market causes the decision is the much less effective way to do things. So I don't think it's so certain to have happened.

When the decision comes first it's still a problem but it's a very different problem.

I should make this explicit, I guess: If you make the decisions before betting, you don't really care what the market says beforehand, you'll make plenty of money either way.

by Dylan16807

4/23/2026 at 6:26:28 PM

(Having seen your edited and clarified comment, I think we basically agree.)

> the version where the market influences the decision is the much less effective way to do things.

Okay, so two possible scenarios: "market influences decision" and "decision influences market."

1. Polymarket offers a contract called something like: "Will the US launch any lethal boat strikes in the Caribbean on April 30, 2026?" A commander of a drone unit for the US military bets $500 on "yes". At 11:51pm on April 30, he's trying to decide whether or not to issue an order to fire on a boat, or to wait 15 minutes for better visual identification of the target. As a result of his bet on Polymarket, he's strongly incentivized to issue the order right now.

2. It's 11:51pm on April 30. A commander of a drone unit for the US military is reviewing images of a potential target boat. He idly opens a browser tab to Polymarket. Lo and behold, he sees that the odds of "Will the US launch any lethal boat strikes in the Caribbean on April 30, 2026?" are at only 0.3%. He's strongly incentivized to issue an order to strike right now and to quickly buy that Polymarket contract before news of the strike breaks.

Does it matter which of these two scenarios might actually be taking place? I don't think so.

by dlenski

4/23/2026 at 6:39:50 PM

The payout is much higher if you make an unlikely thing happen. "Unlikely things" in politics & warfare are probably highly correlated with irrational or irresponsible decisions.

by fwip

4/24/2026 at 3:32:10 AM

If you're in a decision-making position you have lots of events passing by. Your limits are in trying not to get caught, not in searching for the biggest ratios for single bets.

Also there's plenty of things that are unlikely because they're specific, not because they're irrational. Things happening in specific date ranges are an easy one.

by Dylan16807

4/23/2026 at 5:46:34 PM

> until us poor schmucks who just want an accurate temperature reading have to build a fortified compound in order to do so.

A fortified compound would affect the temperature reading.

by thaumasiotes

4/23/2026 at 5:49:07 PM

Betting against what is widely considered as “expected”, “reasonable” is such a major source of profit when one can influence the income. Whether it’s a temperature sensor one can breathe on or movement of troops one can control or influence[0], the idea is the same—except in one of the above you can add “death and suffering” in addition to some unfortunate gamblers losing their money.

A depressing thought: it will only tip in favor of common good when the probability of something that we today consider “normal” becomes so small that betting on that finally becomes profitable to insiders with influence. Imagine that world…

[0] No, I’m not going to change my writing style because it is considered a “tell” of LLM use.

by strogonoff

4/23/2026 at 5:57:58 PM

I don't mean to detract from your point, but regarding your footnote, you seemingly have. Unless it is in your writing style to make direct asides about how one may infer your message was procured.

by dugidugout

4/24/2026 at 3:15:02 AM

Fair point, though it’s isolated to a footnote.

by strogonoff

4/23/2026 at 5:28:33 PM

> On April 15, one trader made $21,000 (£15,600) betting that the maximum temperature would not be 18 degrees, data from Polymarket show. A temperature of 18C was seen as a 99.6pc probability before the temperature spiked later in the day.

I believe that these are the specific Polymarket bets in question:

April 6 (https://polymarket.com/event/highest-temperature-in-paris-on...): this appears to have been something of a "test run", since the odds weren't particularly lopsided until it suddenly spiked in the evening local time.

April 15 (https://polymarket.com/event/highest-temperature-in-paris-on...): the odds were quite lopsided in favor of 18°C, until suddenly reversing in the evening. This is presumably where the fraudsters made all their money.

by dlenski

4/23/2026 at 5:16:17 PM

I don't understand who is taking the other side of all these insane Polymarket bets. Is Polymarket doing it?

by guyzero

4/23/2026 at 6:46:51 PM

I've been quite successful trading weather prediction markets.

The prediction markets were never about predicting outcomes. If that's the level you are playing on, you're playing at the lowest possible level, and probably won't win.

The markets are now about properly modelling other peoples' manipulation of prediction. That's how Wall Street works as well. Companies can beat earnings and their stocks crash immediately after. It makes zero sense if you just model companies. It makes full sense if you stochastically model how an ensemble of humans behave under incentives and human-written bots behave under human-written policies.

"Hairdryer sometimes get pointed at the weather sensor" and "Government sometimes fudges jobs/CPI data" are more or less the same thing. Build it into your model. That's the level you need to play on to profit in these markets. It's not that different from how a chess engine works.

by qurren

4/23/2026 at 7:56:58 PM

Says "prediction markets were never about predicting outcomes", writes long winded tripe stating that "prediction markets exactly about predicting outcomes". Thank you Tai Lopez.

by ethtdhdrh

4/24/2026 at 3:22:18 AM

Here in my groj...

by paradox460

4/23/2026 at 10:38:42 PM

Most of the so called “deep thinking” of HN is this. I think someone called them “deepities” at one point.

by Der_Einzige

4/23/2026 at 7:55:28 PM

I am getting into trading on my own (my main job was in machine learning and I studied math in university). I've also come to a similar conclusion that you pretty much have to model these "manipulations" on top of the statistics/Brownian-motion-driven behavior of any security. I am currently working on a hybrid model for something on Polymarket but it's not yet sophisticated. Do you have any resources that you can point me to that expand on this very idea of adding human behavior to financial modeling?

by Coneylake

4/23/2026 at 9:05:24 PM

Without giving away my exact strategies, I'm also an ML engineer and I'll just say that ML is in 90% of cases the wrong tool, whereas simple regressions and scatter plots will unearth loads of statistical anomalies if you know where to look. You want to find anomalous behavior then hone in on how to make them your counterparty.

ML can help you optimize things after that, but locating diamonds in a soup of noise is not really where ML shines.

by qurren

4/24/2026 at 12:08:43 AM

> "Hairdryer sometimes get pointed at the weather sensor" and "Government sometimes fudges jobs/CPI data" are more or less the same thing. Build it into your model.

Is this comment satire? Bet on things being intentionally and secretly manipulated by people you will never meet? In what direction? This just sounds like a recipe for participating in the most financially dangerous questions.

by creatonez

4/23/2026 at 8:41:54 PM

I'm getting Foundation vibes from this comment. Asimov wrote that in 50s. Which is to say, this is by no means a new idea.

by globular-toast

4/23/2026 at 5:24:29 PM

I don’t understand why these bets are allowed at all. Can one just make an account there and bet in anything?

The whole “prediction market” charade is increasingly proving to lend itself to abuse. I hope regulations catch up with it soon, otherwise more shenanigans will follow.

by thimabi

4/23/2026 at 5:34:31 PM

The problem is that the genie is out of the bottle, even if you try to regulate it away it pops up in offshore jurisdictions and uses crypto. The ease with which polymarket can be manipulated is infinite because there are so many different random things you can bet on. It's a sign of our times and I don't think there is much that can be done about it by anyone.

by alaudet

4/23/2026 at 5:41:18 PM

> offshore jurisdictions and uses crypto.

This vastly increases the barrier to entry for the normal person though. Is your position that just because laws don't work 100% of the time we shouldn't bother with them?

by vizzier

4/23/2026 at 6:00:54 PM

I didn't say that, you said that.

by alaudet

4/23/2026 at 6:05:46 PM

They didn't say you said it.

But wow what a useless way of conversing that is. They asked because it's unclear what you're implying. So could you please clarify if you think regulation would be useful? Or should be done despite being futile? Or shouldn't be done? I can only think of those three answers, is there another?

by Dylan16807

4/23/2026 at 6:14:10 PM

I think smart policy would be a good start. I just made a comment on the sign of our times. I could have worded my one line reply better. I do think it will be difficult to regulate as I don't see a political appetite to do so. Maybe some countries will get it right.

by alaudet

4/23/2026 at 7:34:09 PM

For the record, I do agree with this perspective at least from an external observer of the US. Many places already regulate these types of gambling much better. What I mostly took issue with is what I read to be a resolute throwing up of the hands of any action being useless.

It is indeed unfortunate that the level of corruption in the current US administration likely precludes any action on it in the current term.

by vizzier

4/23/2026 at 5:41:32 PM

Bans from the AppStores will go a long way to removing this behavior. Sure a few die hards will always find a way to gamble, that does not mean we should not have regulations for the majority.

by daheza

4/23/2026 at 7:55:59 PM

You don't need to be a diehard to use a browser instead of an app.

by anigbrowl

4/23/2026 at 5:44:32 PM

> It's a sign of our times and I don't think there is much that can be done about it by anyone.

Isn't cryptocurrency (for the most part) very traceable? If you make it too hard and risky for most people to participate in, you'll limit the negative effects. You could probably quite effectively discourage it by sanctioning any transactions with one of these markets, you've got some opportunity because at some point the cryptocurrency needs to be converted to/from cash.

Of course, you'd have to dedicate some investigative and enforcement resources to the effort.

If to bet on a prediction market you have to both use a VPN and launder your money like you're a drug dealer, and I don't think many people would do it.

by palmotea

4/23/2026 at 6:09:20 PM

> Isn't cryptocurrency (for the most part) very traceable

Mostly no. If you're connected it to a banking account, or other KYC platform, maybe, but the folks capable of doing that are part of the same administration supposedly doing the manipulation, so they would not investigate themselves.

Indeed, they are actually fighting against those trying to regulate it [0]

Indeed, the president's son works for Polymarket, and has invested in it [1]

0 –https://www.npr.org/2026/04/02/nx-s1-5771635/trump-cftc-kals...

1 – https://subscriber.politicopro.com/article/2025/08/polymarke...

by ImPostingOnHN

4/23/2026 at 6:18:13 PM

>> Isn't cryptocurrency (for the most part) very traceable

> Mostly no. If you're connected it to a banking account, or other KYC platform, maybe,

But if you're (say) and American betting on it, the money almost certainly flows through one of those entities. And if you're using bitcoin the ledger is totally public, so you could track it from Coinbase (KYC) to whatever wallet the prediction market is using to accept payment (or vice versa).

> Indeed, they are actually fighting against those trying to regulate it [0]

Choosing to "do something about it" or not is a different question than can something be done at all. I was addressing the latter.

by palmotea

4/23/2026 at 7:05:33 PM

How can I, an ordinary person, track it from Coinbase (KYC) to whatever wallet the prediction market is using to accept payment (or vice versa)." in order to link a real identity to a prediction market identity?

I don't have access to that. The government which has access to that is the very government making money doing this, so would not investigate itself.

If your question was purely technical, the answer is maybe, depending on the exchange flow. e.g. Maybe it was exchanged through Monero along the way or something, then the answer might be closer to "no".

by ImPostingOnHN

4/23/2026 at 9:28:03 PM

> How can I, an ordinary person, track it from Coinbase (KYC) to whatever wallet the prediction market is using to accept payment (or vice versa)." in order to link a real identity to a prediction market identity?

KYC data is certainly confidential.

> The government which has access to that is the very government making money doing this, so would not investigate itself.

I'm not obsessed with the Trump administration, so let's not make everything about them, OK? There are other governments in the world and there will be other administrations in the US in the future. I would like to talk about prediction markets in general.

by palmotea

4/23/2026 at 6:27:22 PM

We seem to be seeing the repetition of every stock/securities fraud that led to the creation of the SEC. But we're seeing people who refuse to let any reasonable regulation to happen.

by Tangurena2

4/23/2026 at 6:35:42 PM

Making gambling illegal except in controlled places reduces the amount of people gambling.

The existence of illegal gambling is far less a problem than the issue of legal gambling from your phone.

by danny_codes

4/23/2026 at 5:32:58 PM

Anything on the site? Yes. Anything at all? No - Polymarket themselves make the markets (and I think they have some partners that can make markets as well, but point is some random user cannot make a market).

by thenewnewguy

4/23/2026 at 9:13:33 PM

> some random user cannot make a market

You absolutely can market make on Polymarket. The barrier to entry is actually extremely low; you can do it from an AWS instance in Dublin (the closest non-geo-restricted region to the Polymarket exchange), and don't need the kind of infra that is needed to market-make on US stocks. Retail can absolutely do it on anything crypto-based.

In order to market make, you just need to price probabilities better than everyone else. That's it.

On Wall Street on the other hand it has come down to FPGAs and free space microwave links because fiber optics' index of refraction causes a ~31% reduction in the speed of light. If you don't have millions of dollars you can't get into that game. Over-regulation cas resulted in this space being only accessible to the ultra-rich.

by qurren

4/23/2026 at 5:39:24 PM

Watching interviews with the CEO is cringe material to an extraordinary level.

by lostlogin

4/23/2026 at 5:44:54 PM

As Ukrainian I find bets if some city would be captured - peak degeneracy. People are being sent to die or protecting their homes should not be someone bet.

by Svoka

4/23/2026 at 6:49:24 PM

They're banned in the USA and Europe, so you can't "just" make an account - you have to use a VPN.

by pocksuppet

4/23/2026 at 5:27:42 PM

Our zeitgeist is now "the grift is the goal."

by VectorLock

4/23/2026 at 5:33:20 PM

I'm worried it will set the tone against all markets and trading, which would be very regrettable.

by neonstatic

4/23/2026 at 5:45:57 PM

Unlikely regulators will do anything given Trump's son is involved with both companies.

by whatisthiseven

4/23/2026 at 5:26:39 PM

[flagged]

by logicchains

4/23/2026 at 5:32:10 PM

I'll steelman it: previously there was no monetary gain to be made by messing with weather sensors. A market like this creates one, creating an externality on owners of weather sensors, on enforcers and courts to investigate and prosecute novel crimes. Administration of taxes on such markets to compensate all the disparate factions harmed by the externalities exceeds the amount which could be collected, so banning is the only proper solution.

by coryrc

4/23/2026 at 6:10:08 PM

> A market like this creates one, creating an externality on owners of weather sensors, on enforcers and courts to investigate and prosecute

I am only half-joking, but this gave me an idea for how to finally get the local courts+LEO near me to get off their asses and actually do some law enforcement and prosecuting - I just gotta create prediction markets on the crimes occuring in public in my neighborhood.

by filoleg

4/23/2026 at 5:33:46 PM

The article articulated this enough, I thought but I guess not.

They're interfering with officially gathered data, used to forecast the weather. And they're not just gambling. They're also gaming the system to make money on it. This goes far beyond 'just gambling'.

by knappe

4/23/2026 at 5:38:15 PM

>They're interfering with officially gathered data, used to forecast the weather.

If that's illegal they should be prosecuted for that. Luxury goods create incentive for theft, but nobody suggests luxury goods stores should be banned to reduce the amount of theft.

by logicchains

4/23/2026 at 5:55:29 PM

Could you regulate the sale of luxury goods meaningfully without having negative impacts on necessary markets? Can you say the same about prediction markets?

by Eisenstein

4/23/2026 at 5:28:17 PM

Certain no negative externalities from these shenanigans here, let people do what they want to do regardless of how it harms others.

by VectorLock

4/23/2026 at 5:30:42 PM

[flagged]

by logicchains

4/23/2026 at 5:32:11 PM

Why do airports collect weather data at all? Just for fun?

by hrimfaxi

4/23/2026 at 5:31:08 PM

Should it be legal to be able to bet when someone will die?

by hrimfaxi

4/23/2026 at 5:32:53 PM

It's already legal for two individuals to bet when someone will die. It's illegal to murder someone; we don't need extra laws to stop that.

by logicchains

4/23/2026 at 5:45:36 PM

Isn't it obvious that allowing betting on something creates economic incentives to influence that thing?

by hrimfaxi

4/23/2026 at 5:33:48 PM

There's a reason we don't have markets to bet on whether someone will be killed, or to create a profit motive for people close to the White House to spill the beans.

There's plenty of legal avenues for the next administration to outright shut these firms down

by aorloff

4/23/2026 at 5:38:51 PM

I recommend thinking about the issue for yourself. It's not hard to see why prediction markets are subject to abuse. Market regulation has little to do with morality or "moral rights". Would I be correct in assuming you're an Ayn Rand fan?

by standardly

4/23/2026 at 6:16:59 PM

John Oliver just did a segment on prediction markets. https://youtu.be/ZN4njIQcSR4

Turns out the US federal regulator is not doing their job, and is actively trying to prevent US states from imposing regulations.

by e28eta

4/23/2026 at 7:12:05 PM

The Trump admin, abdicating their duties? How unexpected /s

by danny_codes

4/23/2026 at 5:28:25 PM

Yep, you can bet on anything. Mike Selig is in charge of regulating it, and he's pretty zealous about suing any state regulators trying to exercise their right to regulate gambling. I think the days of the wild west are clearly numbered, but one guy with a burning passion and a big agenda (and the backing of Don Jr) can get a lot done in the meantime

by bloppe

4/23/2026 at 5:43:25 PM

There are communities larger than you'd expect around just about every topic imaginable. I'm certain there are temperature enthusiast groups, especially given its adjacency to climate stuff. It's probably going to be people mostly betting on something they have better than average knowledge of. I'd be interesting to compare the 'normal' majority temperature predictions from polymarket to local weather station predictions. I'm betting polymarket wins, by a wide margin.

For instance chess wagers on polymarket are super interesting because it's far more informative than a chess engine, even though engines are much stronger than any human. The nuance is that engines don't appreciate human factors like how easy/hard a position is to play. And so an engine might just say 'dead draw', whereas a strong human can say 'nah, white has very good winning chances here' - and the polymarket wagers end up reflecting that. And so there it's mostly strong players making money from people who think turning on their engine and betting based on what it says is something nobody else must have thought of.

by somenameforme

4/23/2026 at 5:26:24 PM

It sounds like the other side of the bet was the actual winning bet when compared to Truth. Maybe they have great climate models and actually make a bet that they have an edge on. Maybe they have a gambling problem. Either way, they are the victims here.

by hx8

4/23/2026 at 5:33:34 PM

They are the victims of Goodhart's law. The contract unambiguously said it would be decided by the reading of that particular thermometer.

by bloppe

4/23/2026 at 5:18:03 PM

gambling addicts is the answer

by 8note

4/23/2026 at 5:22:21 PM

There's quite a lot of ways to interpret this question... but for that day's daily bet:

>A temperature of 18C was seen as a 99.6pc probability before the temperature spiked later in the day.

99.6% of them didn't take the insane bet. And at least one of those 0.4% (by value? count? idk) decided to cheat.

by Groxx

4/23/2026 at 6:27:30 PM

> 99.6% of them didn't take the insane bet.

I don't think the actual bet was insane, but the concept of betting on the weather is insane.

by jjice

4/23/2026 at 6:38:20 PM

People bet on anything and everything, and the less controllable the better, afaict. "I'll bet you $5 that snail will eat the cucumber before the broccoli" - > "fuck yes, make it $20" is 100% a thing I could see happening. Weather is significantly easier to do every day though, unless you know a snail farmer with a twitch stream (if so, hook me up!).

by Groxx

4/23/2026 at 7:19:37 PM

There are legitimate reasons to bet on the weather. If you're a farmer, betting on drought can be a hedge against a bad year.

by marton78

4/23/2026 at 5:24:04 PM

If polymarket were staking wagers on its own platform, then it would have to worry about the integrity of the contracts, which is a nonstarter

by bloppe

4/23/2026 at 5:46:16 PM

You're wrong. The big prediction markets (Polymarket, Kalshi) employ in-house market makers and contractors. They provide liquidity for less-active contracts. They generally are not profitable.

by tantalor

4/23/2026 at 5:28:07 PM

Why do you think it’s a nonstarter when so many of these new platforms do commit fraud all the time and get away with it? It’s only a problem if they get caught, and then only if people actually pay attention enough to care

by mcmcmc

4/23/2026 at 5:30:00 PM

Nope the only money on the line is the people betting. Polymarket gets their cut and has "no monetary risk"

by christkv

4/23/2026 at 6:34:02 PM

Kalshi places bets in their own marketplace - but they have all the data and lots of analysts, so the house still wins on average.

by dymk

4/23/2026 at 5:26:22 PM

Casinos are purpose built to make you lose.

People still show up compulsively everyday.

by WarmWash

4/23/2026 at 5:28:44 PM

Casinos have many games with exact payout odds posted. Polymarket does not.

by gowld

4/23/2026 at 6:54:52 PM

So? There’s no game with payout odds in your favor.

Lotto (at least where I live) also shows the odds, which are always ridiculously low. Still, people play, because the human brain isn’t built to understand odds. It’s essentially worthless as a metric.

by AndroTux

4/23/2026 at 5:29:10 PM

People with cryptocurrency and no idea what to do with it.

by seanalltogether

4/23/2026 at 6:07:07 PM

People that haven't read Black Swan and bet on every "sure bet" they can see

by skipants

4/23/2026 at 5:30:55 PM

Reminds me of when I made about $40k finding a source that had CO2 data in close to real time when other people were tracking one about 12 hours delayed

See https://misinfounderload.substack.com/p/tales-from-predictio...

by ikeboy

4/23/2026 at 5:47:32 PM

Those are great stories in the article!

by I_Write_It

4/23/2026 at 5:23:34 PM

Between this and crypto cryptocurrencies (which obviously can be used to make bets) I don’t know which is more destructive to society

by ctime

4/23/2026 at 5:28:42 PM

How is it even remotely as destructive as casinos, where the odds are always against you? From a probability perspective Polymarket is much more fair, as you actually have positive expected value if you have an information advantage.

by logicchains

4/23/2026 at 5:37:32 PM

Because Polymarket creates an incentive to change the real-world result.

If you create a bet on {person} getting assassinated by {date}, you greatly increase the chances of somebody on the "Yes" side thumbing the scales.

by andy81

4/23/2026 at 6:05:50 PM

Yup. Gambling is already bad but somewhat contained within the walls of a casino or race track.

When you put money on the line for events that are influencable, things get dark fast.

Seemingly harmless sports betting is rife with stories about mob members going to extreme lengths to change the outcome of a sporting event.

It's not hard to see how bad a bet like "so and so won't show up to event x" can go. These don't have to be bets about killing or injuring people to result in people being killed or injured to win a bet.

These companies are a pox on society.

by cogman10

4/23/2026 at 5:38:24 PM

[dead]

by cindyllm

4/23/2026 at 5:53:14 PM

I know a fair number of people who go to a casino, spend a pre determined amount of money and as such, have fun.

Also, in roulette there's nowhere to put your money on whether a countries leader will be dead by the end of the month

by hvb2

4/23/2026 at 6:21:07 PM

I will make this argument in favor of casinos, which is that at least we have coevolved with them. They've been around for centuries. We collectively recognize the dangers. We are not collectively blindsided by them.

Individually, yeah, by all means they can prey on people. But they're on the list of things that have been preying on people for centuries, like alcohol, and all kinds of other things. Ring-fencing casinos has a track record of some success at containing them.

I mean, sure, I'd love to wake up tomorrow and for all of the human race to have advanced to the point that to every last individual we are no longer gambling and that industry vanishes in a puff of smoke. I am as far into the belief that they are immoral as it is practically possible to be. But they are at least a known and knowable risk.

These prediction markets are blindsiding us. We could put up with them for another few decades until we coevolve further with them, or we could just, you know, not. Just end them now. Plus, prediction markets have a certain meta-ness to them that casinos largely lack that will keep them fresh and coevolving their own new ways to predate on us. Casinos have basically reached their final form, prediction markets could take yet more decades to get there and it's possible there isn't a stable endgame with them. Or, again, we could just end them here and now.

by jerf

4/23/2026 at 5:51:56 PM

The ingredient you are missing is fraud

by dabeeeenster

4/23/2026 at 6:27:25 PM

Casinos are regulated and have to be much more transparent. In Europe and Australia slot machines are required to have appx min RTP (return-to-player) of 95%. With sportsbetting, bookmakers cannot just make up results. It's a dirty business preying on weak, but it's not hiding that.

Polymarket prediction results can be swayed by whales and differ from reality. Example: they ruled Tesla unsupervised full selfdriving a real usable feature in ~Feb 2026. It still doesn't exist and won't. This decision is far from being the only such one.

by k4rli

4/23/2026 at 6:50:57 PM

I don't understand this logic. If people with information advantage get to cheat and win, then everyone without that advantage gets screwed. I struggle to see how this is even remotely "fair". It's like playing poker, but some players get to see what everyone's cards are.

Even humoring your logic begs the question: Why is monetizing an "information advantage" valuable to society?

by RIMR

4/23/2026 at 5:27:35 PM

Fiat money is obviously more destructive, but you'd have to do some basic research to figure that out.

by toenail

4/23/2026 at 5:52:08 PM

Here's a thought experiment for you: if "fiat currency=bad" and "hard money=good", why did the world collectively switch? Where are all the prosperous societies that held the line?

by anonymars

4/23/2026 at 6:29:01 PM

There is an answer the crypto enthusiasts have to this, but since I'm not one of them I wouldn't do the argument justice.

The short version is, it's about control and power.

by singingtoday

4/23/2026 at 7:37:52 PM

The chapter of fake-news is over folks. We just started the everything is a lie unless the opposite is proven.

by sebastianconcpt

4/23/2026 at 7:46:37 PM

lies were invented recently?

by nh23423fefe

4/23/2026 at 11:05:46 PM

They are a human factory setting that AI is amplifying to unprecedented new levels by making engineering them in industrial scale brutally cheap.

by sebastianconcpt

4/23/2026 at 5:45:58 PM

> While it is unclear how the temperature might have been manipulated, one possibility shared on weather forums was that a battery-powered hairdryer could have been used

Man I hate headline writers…

We’re I contracted to (legally and ethically) red team a temperature station, a “battery powered hair dryer” would be pretty low on my list of techniques for a number of reasons. First attempts would involve mirrors - parabolic or otherwise- to heat the device from a distance without potentially affecting wind speed / direction sensors.

by happyopossum

4/23/2026 at 6:21:12 PM

Black cardboard stuck to the sensor and a transparent plastic bag around should do the trick with very little effort.

Or you could hold it until it ticks 18.9 or whatever the bet was.

by literalAardvark

4/23/2026 at 5:38:53 PM

Why is Polymarket legal? I just don't understand.

by nanna

4/23/2026 at 6:07:21 PM

For a while it wasn’t in the US. They now have a cut-down version. But a lot of people use VPNs to access the less-restricted international version. So to answer your question, a lot of users are using it in a way that’s illegal.

by dabinat

4/23/2026 at 6:08:07 PM

It and Kalshi are not. But we don't have regulators that want to enforce the law here.

Polymarket in particular started out using crypto and off shoring with a "not legal in the US, wink wink" to get try and dodge regulations.

by cogman10

4/23/2026 at 5:48:30 PM

Why wouldn't it be

by tantalor

4/23/2026 at 8:32:56 PM

Because we have laws that regulate gambling. "Prediction markets" get around them by bending the definition of the word "gambling".

by sethops1

4/23/2026 at 6:01:29 PM

It creates financial incentives for anti-social behavior and the proposed benefits of it being a way to determine truth are dubious and self-serving and would not be worth the societal cost regardless.

by Eisenstein

4/23/2026 at 7:58:14 PM

Probably the clearest counterpoint to the theoretical utility of prediction markets: it creates a financial incentive for influencing future events.

Today it’s the temperature at an airport in France. Maybe another day it will be the lifespan of an geopolitically important person.

by janalsncm

4/23/2026 at 6:32:14 PM

Is it clear already how bad of an idea, and social disservice, Polymarket/Kalshi are?

by dlev_pika

4/23/2026 at 6:55:39 PM

[dead]

by cindyllm

4/23/2026 at 6:29:13 PM

At some point, the market for markets will demand better regulation than this. But I find it a little absurd that anyone is still putting their money into these markets with story after story of obvious fraud.

by iambateman

4/23/2026 at 6:33:23 PM

> I find it a little absurd that anyone is still putting their money into these markets with story after story of obvious fraud.

Then you do not understand gamblers. They make emotional decisions not rational decisions. That's why the lottery works (i.e. "someone has to win")

by sbarre

4/23/2026 at 6:31:00 PM

They spent a lot on marketing, it doesn't surprise me at all

by guizadillas

4/23/2026 at 5:25:37 PM

> While it is unclear how the temperature might have been manipulated, one possibility shared on weather forums was that a battery-powered hairdryer could have been used, according to Le Monde newspaper.

Clickbait headline FWIW.

by jbrowning

4/23/2026 at 6:33:07 PM

Wonder how the founders/board/investors of the bad incentives factory would manage their site after a massive crowdfunding campaign bet that they'd all still be alive in 2027.

by gmd63

4/23/2026 at 7:42:32 PM

Apparently you can gamble on how many cars drive past a traffic camera in a given timeframe.

Traffic jams for cash now is a reality.

by bombcar

4/23/2026 at 6:25:31 PM

Remember when it was just common sense that letting people gamble on things would undermine the integrity of those things?

by johnhamlin

4/23/2026 at 6:48:49 PM

The critics of prediction markets needs to decide if they are against the markets because they are gambling, or because they aren't gambling.

by LanceH

4/23/2026 at 7:11:35 PM

No, they don't. It's fine to be against them in both ways, considering that the platforms themselves can't decide if they're gambling or not.

by tsunagatta

4/23/2026 at 5:21:57 PM

John Oliver had a segment on prediction markets this week. It covers insider training and opportunities for blatant manipulation like this, well worth checking out. The example in the Last Week Tonight segment was betting on dildos being thrown on court during a WNBA match. And then travelling to the match to throw the dildo.

[0] https://www.youtube.com/watch?v=ZN4njIQcSR4

by w-m

4/23/2026 at 5:43:42 PM

The WNBA bit was less alarming than the betting on various aspects of the US + Israel versus Iran war.

All gross.

by lostlogin

4/23/2026 at 6:12:47 PM

Why is the WNBA alarming at all (other than the fact that we shouldn't be throwing dildos on the court at all, of course)?

I'm just not sure why anyone would take a bet against someone who can single handedly make their side win. It would be like someone making a bet that I won't eat a hot dog for lunch tomorrow. Of course I'm going to eat a hot dog for lunch tomorrow. Why is there anything alarming about that? It's just stupid that anyone is taking the other side of that bet.

by Petersipoi

4/23/2026 at 5:47:01 PM

Idea : "Manipulation of real world events because correct prediction of real world events is incentivized."

Try to scale this anywhere from hairdryer usage to trip temp sensors to nuclear bombs going off in poor countries.

by dwa3592

4/23/2026 at 5:21:28 PM

Beautiful con, tbh. I don't welcome this behavior (borderline criminal), but you have to admit - well played.

by mndgs

4/23/2026 at 5:46:48 PM

well over the border

by hughw

4/23/2026 at 6:08:54 PM

Which law? I genuinely don't know. These prediction markets are new enough that I'm not sure if the laws have been written yet.

by Petersipoi

4/23/2026 at 6:23:05 PM

Reminds me of not long ago someone writing about "Everything is Lies Now"

by sebastianconcpt

4/23/2026 at 5:51:37 PM

The guy will be solely responsible for half a degree of global warming next year.

by efitz

4/23/2026 at 6:42:15 PM

Hair dryer? Or something like a mirror from a comfortable distance?

by mkhpalm

4/23/2026 at 6:37:16 PM

Outside Trading.

by vibe42

4/23/2026 at 6:01:19 PM

Fun fact: Kalshi runs ads that start with a guy saying "I just made money because it snowed!"

Make of that what you will.

by phendrenad2

4/23/2026 at 6:09:21 PM

The libertarian argument for prediction markets is really beautiful.

It's just a pity it basically depends on all participants in the prediction market being basically unaware that they are participating in a prediction market, and being oblivious to the incentives to create the outcomes they are predicting by the very act of predicting it with money.

But other than that minor detail, that little minor catastrophic flaw in the foundation, it's a beautiful argument.

I think we can call it as a society. It's a failure. We can go back to banning them, not just for moral reasons, but just pragmatic ones. The theory doesn't work. The supposed benefits don't manifest, and "unanticipated" costs to everyone do. We did the experiment. (Again.) We can close this out now.

by jerf

4/23/2026 at 6:10:44 PM

Now bet that climate deniers will use this as example that lots of temperature data is faked.

by FrustratedMonky

4/23/2026 at 6:05:20 PM

Quite literally EVERYTHING around us is now subject to possible manipulation by these idiots if they think they can profit.

Even the US Government has executive and legislative officials profiting from secret information they know from doing their duties.

I wonder when someone who does cloud seeding will place a bet about rain at some unlikely time and place.

Or the next large forest fire.

by krunck

4/23/2026 at 6:25:12 PM

> I wonder when someone who does cloud seeding will place a bet about rain at some unlikely time and place.

Each year, one of my state's legislators introduces a bill to outlaw chemtrails [0]. It never leaves committee. This year, he added the plot of Termination Shock [1] to his bill. This proposed legislation already includes "cloud seeding" as a crime. Penalty of $500k/day and each day is a separate crime.

0 - https://apps.legislature.ky.gov/record/26rs/hb60.html

1 - https://en.wikipedia.org/wiki/Termination_Shock_(novel)#

by Tangurena2

4/23/2026 at 6:31:48 PM

And as a result we should gain stronger epistemology. How many cities base their official temperature readings on just a few sensors rather than a widespread network?

Sure you might argue, maybe this was an issue with Polymarket choosing a weak source rather than the gov, but is that really true? If you question measurements like this you quickly get labeled an climate denier.

IMO this is good for the world, temp measurements should be based on thousands of sensors not just one. And if cloud seeding works, all the better for humanity, it's likely a key to terraforming future planets.

by aeternum

4/23/2026 at 6:39:47 PM

You completely missed the issue. Météo-France already has tens of thousands of stations across the country, they're very obviously not basing their entire models off of one sensor in Paris CDG.

The degenerate idiots from Polymarket bet on this particular sensor. There's no law preventing people from betting on single sensors. And we can't make laws preventing people from acting on the world in all the diverse ways that can be exploited to cheat in prediction market.

We should just blanket ban this negative-value industry. We don't want people betting on forest fires and then starting them.

by thrance

4/24/2026 at 12:47:04 AM

I would like to see France ban the tourist scammers before they worry about fools willingly making stupid polymarket bets on a single sensor. Also good luck banning polymarket, isn't that the one that trades using crypto?

by aeternum

4/24/2026 at 11:52:34 AM

The "tourist scammers" are already illegal... Holy whataboutism.

by thrance

4/23/2026 at 6:43:54 PM

Not only is everything subject to manipulation, but it’s incentivized—with a new opportunity to capitalize on the unwitting.

by antif