i don't think anyone is under the delusion that it is foolproof.

Obviously, cops can fake all that stuff. But if you're just an average sex worker, the law probably doesn't have it out specifically for you, and it's a lot lower hanging fruit to just go for the careless sex workers who don't even verify.

The amount of time/effort they would have to spend (while not necessarily a lot) wouldn't be justified by the probably non-existent increase in the total busts, unless they had an axe to grind against a specific provider for some reason.

source: i moonlight as a male prostitute. and i disappoint a lot of women.