Here is a simpler version: "Would you be OK with someone talking like that to you?" If the answer is no, then you know what to do. If the answer is Yes, then t

Here is a simpler version: "Would you be OK with someone talking like that to you?" If the answer is no, then you know what to do. If the answer is Yes, then the other person probably did cross the line or whatever. If the answer is Yes, but ________"Insert any statement of the contrary nature or how infallible you are here"____________, then you are a jerk. It is not just about waiters, but any human being be it higher in whatever illusionary status system you believe in or lower than you. Treat others how you would want to be treated.