You can pretty much scratch every place off your list if it bothers you. Or you can be decent to the people making your food and it won't happen.
I did fire someone who did it alot, but he had other customer service issues too. If I fired everyone who had done it I wouldn't have a crew.
Food service people often get treated like servants and have to take it with a smile. Treat them with respect and you'll get the same back. Treat them like slaves and you get spit or worse.
Sooooo, you're saying you know your employees spit in the food you serve, and as long as they don't do it "alot" you don't do anything about it ??................:nuts: