There's one thing called common sense and a little bit of intelligence.
Most of these ""security"" screeners doesn't have any of the above,
most probably due to faulty training, and poor psychological learning.
Last time my wife and me went in flight " to Seattle" , she was not
permitted to wear the shoe covers I use in operating room, " THEY ARE
TRANSPARENT". The stupid guy told her they were no permitted.
I asked for the rules and no one knew where to find it.

ENT