[reeckoh]

Regardless of your perception of fairness, you should be aware that waitstaff usually remember repeat customers who never leave a tip.

It might not be a great idea to frequent the place if that's your chosen form of social protest.

[carlosjobim]

So scary, what will they do? Frown as hard as they can?

[not_the_fda]

It usually involves bodily fluids.

[renewiltord]

I got food poisoning when at an American university and I used the university hospital. They followed up with me to ask me whether I ate out anywhere. Next thing you know they've gone and done an inspection on the place and it's closed for a couple of days. Seems a bit high risk.

Tbh I think I got sick off my own food but I was doing the thing where I just honestly gave them all the info. I never really expected anything to come of it.

[carlosjobim]

No, restaurant workers will not mess with your food in that way. No matter what they think of you as a client. Ask people you know who have experience in that sector and they will tell you that such things are absolutely taboo. Anybody who did anything like that even once - or even suggests it - would be instantly fired and blacklisted in the community.

If the waiters or chefs hate your guts, at most they will swear in the kitchen.