Good Bruce Schneier op-ed on why terrorist profiling fails:
I have an idea. Timothy McVeigh and John Allen Muhammad – one of the accused D.C. snipers – both served in the military. I think we need to put all U.S. ex-servicemen on a special watch list, because they obviously could be terrorists. I think we should flag them for "special screening" when they fly and think twice before allowing them to take scuba-diving lessons.
What do you think of my idea? I hope you're appalled, incensed and angry that I question the honesty and integrity of our military personnel based on the actions of just two people. That's exactly the right reaction. It's no different whether I suspect people based on military service, race, ethnicity, reading choices, scuba-diving ability or whether they're flying one way or round trip. It's profiling. It doesn't catch the few bad guys, and it causes undue hardship on the many good guys who are erroneously and repeatedly singled out. Security is always a trade-off, and in this case of "data mining" the trade-off is a lousy one.
