No “Please do not” feature will ever work. Make sure something cannot be done, then bolt on an additional “well, here is a bone” opt-in feature (incl. the option to send fake data), if you really need to. Everything else is hoping, quite unreasonably, the “threat” of a lawsuit is sufficient to stop companies from violating your expressed preference. Hint: If they gave a damn they’d not do that shit in the first place.

Its like the, “Ask website not to track” feature in FireFox. Its really like saying, “Oh no, Please don’t track me”.