Why is it even necessary? Surely the super efficient TSA is there catching all the bad and nasty things which shouldn't be there?

Here in AUS it is possible to fly domestically without showing anyone anything until you walk to the gate and are boarding the plane. On line check in is a boon and there are real time savings.

I've generally found security to be quick and easy, place anything metallic or bulky is placed on the belt, no problems.

Maybe it is time to start looking for the most efficient way to run an airport and design systems, including security to complement this rather than designing a security system and making everyone else conform to their needs.

TSA is there to provide a service not to receive service.