Moron would be a good, or Bozo

Barista: Okay, and a name for your cup?

Tourist: What?!

Barista: Name for your cup?

Tourist: Why would I want to name my cup?!

Barista: Just tell me your name.

Tourist: I shouldn’t have to tell you my name — what is your problem? [Turns to friend] My lord, New York is so weird…

–Starbucks, Rockefeller Center

Overheard in New York