Oh, or my favorite from a part time job. If you see a delivery guy carrying flowers, don't try and be cute and say shit like "Are those for me" or "Hey, you can deliver them to me!"
Because, in fact, NO, they are NOT for you unless your name is on the fucking tag. And NO, I can't deliver them to you unless your name is on the fucking tag.
I had to deliver to some golf course this weekend. I couldn't find the fucking spot they wanted them and as I'm walking around some whore yells "Oh hey, over here!" So I turn around thinking cool, found them. I get about half way and she says "Sorry, I was just kidding!" Apparently when I turned around and walked away without so much as a word she got upset that I was rude to her.
Rude was fucking around with a guy trying to do his god damn job. Rude was trying to be cute and telling a joke that I hear every fucking time I work that job. Rude was getting all bitchy because I didn't find you funny. Rude was your husband chasing me down and demanding an apology and then having the nerve to put his hand on my shoulder when I walked around him.
Leave people who are doing their jobs alone. If you have to talk to them, be polite, be nice and try to understand that they are doing their job. They didn't make the rules up, they simply have to follow them. If you have a problem with the rules, or that person's application of the rules speak to the manager. They get paid for getting yelled at.