I was mistaken for a person dressed up as a pilot once.

The hotel I was staying at a hotel in Atlanta that had one of these Dragon-Con (SP?) conferences, its thousands and thousands of SCI-FI fans dressed as their favorite characters. You can even join like Darth Vaders 510th legion or something. But we walked in there in uniform and a few thought we had come dressed up as airline pilots, but most just smiled and made light of the fact we were staying at the hotel during the event.