Originally Posted by
hiltonhead
More of a questioning technique than hassle. An evasive person will stammer and studder as they try to think of the most correct answer, [...]
Plenty of people can be nervous due to the stress of the airport experience, fear of flying, fear of authority or confrontation, etc. And thus may stammer, seem to take too long to think of the answer, etc.
Of course, as far as the FTers go, the answer will indeed usually be, "Go SPOT yourself, and do the same to Komrade Kippie and Skeletor whilst you're at it."