Anyone who has studied psychology, religions, and the theories of collective behavior, would agree that it is just a matter of time before a group utterly consumed by hate (radical Muslims being but only the current example) succeeds in another 9/11-type attack. This is when the government-inspired fear and the government's desire to exercise control over everyone will take a heavy toll on all forms of transportation, our smallest liberties, and our entire economy. The TSA clamps down on the airports while 50,000 people die in car accidents each year. Life is, in fact, often dangerous. It was about 300 year ago when Baruch de Spinoza concluded that governments exists for man, not the other way around.
Air travel has become such a depressing and humiliating experience for me since 9/11, that I've gone to great lengths to avoid it in favor of Amtrak or Web conferences. Though we can guess they may prevent a few attacks here and there, the TSA's constantly expanding activities play into the goals of the terrorists who wish to completely disrupt out lives.