If a waiter or waitress took your order, brought your food and took away your dirty plates...then YES, you should leave them a tip. I have personally wiped off tables when I have sat down, but that does not relief me from the idea of leaving a tip. Tipping is subjective though. Some people feel obligated to leave a tip no matter what. I tip according to service. Even the quality of the food doesn't reflect my tip, as the waiter did not cook it. I have left very good tips and have left none what-so-ever. It depends on service...not on whether I am a neat eater or not.