I've definitely noticed that my favorite takeout place's POS makes giving no tip as hard as possible (Other->No Tip->Yes). "Fortunately" that is also a place where the owner is a prick and doesn't share tips with the staff so they encourage you to leave no tip.
And the really funny thing? If it wasn't about the same number of presses to leave a custom tip, I would generally round up at most POSes. Which isn't a lot, but it does tend to cover credit card fees on the average and makes card statements easier to skim. Of course, I have also noticed a rise in "Regular" and "Cash" pricing where those fees are explicitly passed on to the customers to begin with so...
I'll tip quite generously for a sit down meal or something like a haircut. For calling me up to the counter when my takeout is ready? Fuck off.
I see you've never witnessed the DoL fuck a small business to death over stuff like this. The owner would be required to pay back, at minimum, the x amount he stole from the employees. Often it's several times as much, which could easily bankrupt them.
The real issue is that employees don't usually know what the boss is doing is illegal.
Mostly what happens is the owner pays back a fraction (if that) before telling the former employees to fuck off. Said former employees then need to decide if it is worth finding a lawyer to pursue this. And the margins for small businesses are often small enough that it is pretty easy to shuffle off any assets and then declare bankruptcy before doing it all over again later.
Everyone loves the news story where an asshole has been ordered to pay a massive fine. Very few people pay attention to what happens after the local DA takes a campaign photo.