i've never done anything to anyone's food at my dad's restaurant, however there was one time where a party of about 10 had a baby. This baby had rice and jello all over the floor, on top of that the idiot parents smeared the jello (walked all over it). When i charged them, i charged them according, not charging more for the mess or anything. They came back saying that i over charged them, and i got pissed, i asked them how and they claimed their daughter, who looks 12-14 ish is under 10 yrs old. so they argued over 2 bucks, wow~! Then they got pissed at me for getting pissed, speaking in a different language and crap. the father asked me, why are you mad? you're the one that over charged us! I replied, you made all that mess on teh floor, i have to pick it up and you didn't even tip a penny. he put a dollar in the tip jar, i took it out and gave it back to him saying "i don't want it." After that incident i did not work for my dad for a long while, haha, at least not a water. I seriously hate people who doesn't tip, what's so wrong with tipping? It just a few dollars!