The overarching comedic fallacy of the entire TSA is the idea that there are any terrorists in the US even TRYING to blow up planes.
If there were terrorists hellbent on killing a bunch of Americans, they would already be doing so at far easier targets that don't have ANY security. One suicide bomber in a crowded mall, nightclub or theater would do more damage than blowing up a plane.
Now, if we were dealing with all kinds of bombings in public places on a regular basis, that would be a different story. But we're not.
So why are we spending billions of our tax dollars on this? It just makes no sense at all.