I thought of this exchange last week when the New York Times revealed that the Transportation Security Administration has created a secret watchlist for troublesome passengers. The TSA justified the list by saying that its screeners were assaulted 34 times last year, but did not release any details about the alleged assaults.Naturally, the TSA’s official definition of troublemaking goes well beyond punching its officers. According to a confidential memo, any behavior that is “offensive and without legal justification” can land a traveler on the list, as can any “challenges to the safe and effective completion of screening.” Anyone who has ever “loitered” near a checkpoint could also make the list. So could any woman who pushes a screener’s hands away from her breasts.