To quote a Dartmouth history professor who taught a class on the subject: "if you don't get randomly selected for a search on your next flight you aren't doing

To quote a Dartmouth history professor who taught a class on the subject: "if you don't get randomly selected for a search on your next flight you aren't doing your homework" It's not prohibited but they notice and subject you to harassment by the system at every action with every part of the system that is integrated with their database.