Pet Peeves on the side of the waiters/waitresses

Of course, people aren't obligated to tip, but it's kind of an understood thing that tipping is part of the deal.  Unless the service is exceptionally bad, I would never even consider not leaving a tip.   I think not tipping really is an asshole move.

I remember once a customer left a waitress (this was when I was a busboy at the the Olive Garden) a nickel for the tip.   She was not a bad waitress and she had a decent personality.   But obviously she was also hot tempered.   When she saw what the customer left her, she grabbed the nickel, ran out the door and threw the nickel at the customer and said something like "you can keep your fucking nickel!" and then was promptly fired.   I know she wasn't professional, but I felt bad for her.