I[dentifying]D[ocument]s and the illusion of security, op-ed by Bruce Schneier.

Identification and profiling don’t provide very good security, and they do so at an enormous cost. Dropping ID checks completely, and engaging in random screening where appropriate, is a far better security trade-off. People who know they’re being watched, and that their innocent actions can result in police scrutiny, are people who become scared to step out of line. They know that they can be put on a “bad list” at any time. People living in this kind of society are not free, despite any illusionary security they receive. It’s contrary to all the ideals that went into founding the United States.