Off topic, but in the UK several moons ago, people going into UK nightclubs used to be very fond of wearing their hair in buns to conceal drugs, as the security of the nightclubs were not allowed to search your hair (I forget why, but think it constituted sexual assault or something bizarre). Clearly airport security is a whole different ball game tho! (It just reminded me of the time I was about to be turned away from a club because my long hair was up in a bun - I just took it down of my own accord, and that satisfied them!)