You want bad behavior? How about the guy who cussed me out and then demanded that we give his whole party their meals free because I brought his teenage daughter exactly what she ordered? The girl ordered a breakfast that didn’t come with a meat, and then it was apparently my fault that I didn’t bring them bacon. When I was then unable to snap my fingers and make the bacon appear in 30 seconds and he started bitching, I finally just snapped and said “Sir, the cooks are taking the bacon intended for someone else’s meal and sending it out to you the very second a batch gets done, and the only way I can get it out to you any faster is to bring it out half-raw. I don’t think any of us wants that.” That’s when he asked for a manager.
When the manager politely declined to reward them for their idiocy and assholishness, the guy started in because I’d had to make a second trip to get all the food for a party of seven, which resulted in some of them having to wait a whole minute or so. I got 45 cents off their $40 check.