I simply don't believe your claims.
1. Side arms absolutely set off the alarms if you walk through them, t hat's why there are corridors for LEO to walk around the X ray Machines.
2. I know it happens but not 3 out of 5 times that you go to the airport do you see that kind of violation.
I spent several months working airport security after 9/11 and know at least that much.
Well, you need to spend some time at the East Terminal at Lambert.
The cops definitely walk through the metal detectors, specifically the left most machine. Even though the lights on top of the machine are lit, they never go off. Usually this machine is not manned in the morning.
And I am constantly seeing young girls setting off the magnetometers. One instance specifically comes to mind. The head of our IT dept was coming to town to set up a new scanner system. After I met him, and we were walking out, I saw this really beautiful blond coming up to the machine. I stopped and said, hey **** watch this, she's going to get frisked. Sure enough, she set off the machine, and all eyes were on her. After going over her with the wand, making sure she raised her arms well out to the sides, they found she had a thin chain around her waist. **** asked how I knew it would happen, which my reply was, "did you see her chest?""
On a personal note, on my last business trip, I was almost strip searched over a paper clip that set off the machine. I forgot that I had one in my checkbook, and the Totally Stupid Assmonkey said I would be stripped if they didn't find what was setting the machine off. After he found it, I asked if I could keep it, or if they were afraid I would clip the pilot's flight plans together.
They kept it. Must have been on the prohibited list. They missed the lighter in my pocket, though.