The run of the mill crazy person could bomb the TSA lines and easily get dozens or hundreds of people. The reason there aren't more bombings is because there largely aren't people who want to do more bombings.
Or more! I hesitate to write what you did because I didn't wanna end up on one of those lists, but you're absolutely right.
I remember often standing in line at Dulles. Backed up to the escalators, you look down and see the security line completely folded on itself(like the game snake), people filling the entire space logjammed by security. There were easily more people there than on any flight I took out of Dulles.
