My friend posted this picture on facebook:
I like this picture because it sums up my complaints about people who give bad tips. The (nonexistent) tip here isn't because of bad service. This person basically felt a compliment was interchangeable with a tip and decided to save money by not paying. I'm fine with giving a bad tip for bad service, but the rule still remains that, if you can't afford to tip, you can't afford to go out to eat.
PS, I thought about putting this topic in TNZ because it has gotten heated in the past, but I wanted to get a larger view of both the pic and the issue in general.