Yeah, its almost a joke with them sometimes, airport "security" is far from "secure".
For example....
I know a buddy that made a round trip to FL and back with his dive knife on his regulators, which he carried on. They even did the swab test and did not notice the knife. He did not do this on purpuse, but still, what a miss, and TWICE!
I have my own tale.....
My wife and I always travel together, this involved her as well.
To start, I never set off a metal detector, never. Well, the dam thing goes off 3 times. Only thing on me that was metal was the button on the front of my shorts and the zipper. So figure that out to start with. So needless to say, I get pulled to the side for a pat down. They even patted down my socks, which made me laugh. While this is happening the other TSA screener is giving my wife the 3rd degree that she has liquids in her bag, which she does not. My wife just tells them "if you think there are liquids in there, unpack the whole bag". So they did, they spent 10 minutes going through the whole bag. The contents of the bag was a regulator set, plastic Ikelite camera housing, small camera, and cloths. They did not find anything, because there was nothing to find. Now here is the kicker... MY bags, the guy who needed a pat down and treated like a total threat.... My bag has an all aluminum camera housing, strobes, regulators, strobe arms, chargers... Stuff I know there Xray can not see through, theres no way. Yeah, my bag was not opened, they did not ask about it, just took it off the belt and on my way. You would think if they wasted the time to pat down a guy in jean shorts, tee shirt, and crocks, you would take the time to figure out what all those black blobs are in his carryon?