Who would want to buy the results of a highly unscientific poll about body fat percentages?

The highly unscientific poll aspect is irrelevant. The question should be, who would want to know the body fat percentages of potential consumers (as identified by IP addresses, cookies, and other methods of online tracking used by the forms)? This would obviously be useful for targeted advertising, for example. And this information can be correlated and gathered in giant databases with profiles of consumers.

Well, maybe it's just me, but I can see their data being posioned by checking different numbers to see all animals :)

Data brokers do not seem to care if their data is poisoned. That's their customers' problem! Their customers don't have any way of validating it, so there's no incentive to care. Haven't you ever received spam that was based on some extremely spurious connections?

I did that too but the first number I inputted was my percentage. I'd say most people would do the same thing.

People trying to sell people ozempic and other glp-1 compounds.

If it helps, I’m not storing any user data. There’s no backend or database, the app just looks up values in a static json. Just copied the ui code from chatgpt and put it into a react app. The only thing I’m tracking is page views!

Nothing against using what you want, but isn't React bit overkill here? (For one input and one image).

it definitely is, but I use it at work and find it to be pretty readable. Since I was asking gpt to write most of it I wanted it to be in a framework I could easily understand and work in as well.

The design encourages trying multiple values, and most people visiting the site probably don't even know their bf%

Now they know I'm 100% body fat