My last name is pronounced Fuck Off (it's Vietnamese)
Waiter: Can I see your ID?
Sharingtime: Sure.
Waiter: Hmm. How do you say your last name?
Sharingtime: It's actually none of your business.
Waiter: Well what if I refuse to serve you because what you say doesn't match up with your ID?
I look at him like he's an idiot. He stares at me for a second blankly and then takes our orders.
(This actually happened.)