I tip 20 percent. I do this for three reasons:
1) I was a waiter. This idealogy explains why many celebrities tip well.
2) You can't blame the waiter for everything. Most people who blame the waiter are cheap. The guy had nine friends and a $70 bill, lets think about that. He said the food was bad, I will go out on a limb here and say the waiter probably did not cook the food. Just a guess.
3) I have class. We can argue class as much as you like, but not tipping is an indication of not having class. Seeing that you were all on the Oprah Winfrey bandwagon this week, check out her episode on tipping some time. It is an act of "class." Poor service should be handled differently. I have both taken out clients for dinner and been taken out myself, tipping is without question a major role in someone's character. Take a girl out to dinner, pay the bill, and go to the restroom. Many girls will look to see if you tipped
As far as arresting the guy, that is a bit much. Waiters and waitresses take the good with the bad. That is life. Putting a mandatory tip on you because you look young is a part of life. I have had it happen as well. But I assure you, in Newport and many places in Hollywood, I rarely get the "Mandatory" tip placed on me. In the long run, tipping pays off.