I don’t claim to be an expert on security, but Bruce Schneier is and he is against the security theatre our current TSA is. He says pretty much the same thing that I think, but he has more knowledge on the whole subject
Here is a recent interview from Popular Mechanics
Q: So what kind of attack will this prevent, that otherwise might be successful?
A: There are two kinds of hijackers. There’s the lone nutcase, like someone who will bring a gun onto a plane because, dammit, they’re going to take the whole plane down with them. Any pre-9-11 airport security would catch a person like that.
The second kind is the well-planned, well-financed Al Qaeda-like plot. And nothing can be done to stop someone like that.