Can I be rude to attractive waitresses on purpose because maybe then they will spit in my food?
That seems weird. What makes a waitress attractive to you?
I don't know, I can't really say.
Well regardless of what they look like, you should try not to be rude. It is not okay to be rude to the people waiting on you.
You are right. It doesn't really matter, they are just doing their job.
I am glad that you realize that you shouldn't be rude to service people. Technically you shouldn't be rude to anybody but service people is a good start.