Anyone who has worked as a waiter knows that people who don't tip are the worst. In the United States, many waiters only get paid $2 hourly and, therefore, only survive on tips. Some restaurants don't even pay their servers an hourly wage. This is basically common knowledge at this point, so for most people, not tipping is simply out of the question. But there are always those people who get angry for the insistence that they tip. I find that these come from two camps. The first camp is Boomers…