Behaving well almost always behooves you. That is especially true when eating out. Having spent ample time behind the scenes in the food industry, I can assure you, one and all, that if you mistreat the people that prepare and ferry your food, you run a high risk of it being tampered with. (By ‘tampered’ I mean deliberately over-or-under-cooked, spit upon, dropped on the floor, or any other monkey shines the staff come up with.) Be nice to the food handlers. They are generally overworked, underpaid, routinely disrespected, and itching for revenge.