Originally Posted by
bocastephen
Depends where you are in the airport. Outside the sterile area they can't really do anything, so flipping them the bird is probably OK depending on your mood. If you're outside the terminal itself, they are fair game for what ever you want to say or do.
I'd refuse inside the sterile area. Since I always arrive at the airport early, I would have the time to "pay" for my insolence. In the end, however, I would prevail.