Well, last shot: I didn't mean IQ, whatever IQ is, and I certainly never mentioned it. I meant competency and the ability to think independently. For one thing the "first batch" of screeners was probably different from the second, third, fourth etc. batches; at least in the beginning they were pretending TSA was something new. It could be a training failure or poor policy limiting personnel but—whatever the cause—I am NOT comforted by what I have seen that air travel is even a hamster's breath safer than it was before 9/11. Procedure is never enough, and the phenomenally stupid questions I have been asked by security do not suggest much more is being added. Some of the workers may be fabulous, but it doesn't save the program; too many are not.
Now, a toilet scrubber. I think you've hit on something there. How tragic that would even occur to you in connection with what is a very important job.