Bruce Schneier has a neat column titled The War on the Unexpected which is worth a read:
We’ve opened up a new front on the war on terror. It’s an attack on the unique, the unorthodox, the unexpected; it’s a war on different. If you act different, you might find yourself investigated, questioned, and even arrested — even if you did nothing wrong, and had no intention of doing anything wrong. The problem is a combination of citizen informants and a CYA attitude among police that results in a knee-jerk escalation of reported threats.
This isn’t the way counterterrorism is supposed to work, but it’s happening everywhere. It’s a result of our relentless campaign to convince ordinary citizens that they’re the front line of terrorism defense
He also links to an article about CYA security which he wrote earlier this year. Worth a read.