Schneier on Security: The War on the Unexpected
2007/11/07/1424RTFA: http://www.schneier.com/blog/archives/2007/11/the_…
Someone — these are all real — notices a funny smell, or some white powder, or two people passing an envelope, or a dark-skinned man leaving boxes at the curb, or a cell phone in an airplane seat; the police cordon off the area, make arrests, and/or evacuate airplanes; and in the end the cause of the alarm is revealed as a pot of Thai chili sauce, or flour, or a utility bill, or an English professor recycling, or a cell phone in an airplane seat.
Of course, by then it’s too late for the authorities to admit that they made a mistake and overreacted, that a sane voice of reason at some level should have prevailed. What follows is the parade of police and elected officials praising each other for doing a great job, and prosecuting the poor victim — the person who was different in the first place — for having the temerity to try to trick them.
Really good Bruce Schneier essay about reporting suspicions and spying on your neighbor.