Idiocy 101: A Midway Airlines flight was recently returned to the gate in Milwaukee, all the passengers and their luggage taken off the plane and searched, and the entire plane inspected from top to bottom, because someone found Arabic writing in a copy of the airline's in-flight magazine. The passengers on the flight didn't get to fly out until the next day.
Anyone who's pissed off at the airlines and paying attention now knows he can DoS the airlines merely by scribbling in plausible-looking Arabic in the airline magazine.