Your sarcasm is spot on. The first time I flew after 9/11 and had to stand in a 4 hour line to try to get through security I thought to myself, "If the terrorists want to get us, why don't they just kill people waiting in the security line?" Which obviously means we need a checkpoint before the checkpoint. Which makes that first checkpoint a target, so we'll need a checkpoint before that one and then it's checkpoints all the way down.

Beyond that, the fact that a crazed lunatic armed to the teeth could only kill 1 person in a crowded airport before being shot by police kind of says that there was adequate security in place already. What does the TSA want - the ability to stun everyone in a 300 meter radius anytime someone looks at them funny?