Is aviation security mostly for show?
I've been a fan of Bruce Schneier and his "security theater" concept since I was forced to read a book of his in my Computer Security class in college. If you are unfamiliar with his idea of "security theater" this CNN article will give you a great general overview.
The money quotes...
Our current response to terrorism is a form of "magical thinking." It relies on the idea that we can somehow make ourselves safer by protecting against what the terrorists happened to do last time
and...
Despite fearful rhetoric to the contrary, terrorism is not a transcendent threat. A terrorist attack cannot possibly destroy a country's way of life; it's only our reaction to that attack that can do that kind of damage.
and...
The way we live is open enough to make terrorists rare; we are observant enough to prevent most of the terrorist plots that exist, and indomitable enough to survive the even fewer terrorist plots that actually succeed. We don't need to pretend otherwise.