Originally Posted by
FlyerChrisK
Roughly speculating, you'd have the calm folk (frequent travelers, well-trained terrorists) and the more anxious folk (less frequent travelers, new fliers, people scared of flying, etc.). Good luck choosing what you pick up on.
And people like me who are quickly short-tempered and hostile to machines. For example, those horrible call systems that make you say "existing customer" instead of pressing a key. Socially speaking, I see no need whatsoever to be polite to a machine, so I'm not.