Any and all passenger screening would be worthless
It already is, because the system leaks information that would make it trivial to find a way to sneak guns/bombs/etc. onto a plane. All you need is a sufficient number of people willing to go to jail (and actual terrorists are willing to die for their cause). You just keep throwing different approaches to packaging/disguising your bomb/gun/whatever at the TSA checkpoints until you find a reliably repeatable mechanism. Game over.
It gets better though... you could cut down on your search costs by taking advantage of the fact that - at some airports -the screens the X-Ray machine techs are reading, are sometimes (such as O'Hare, Terminal 3, last Friday night) aimed so that anybody inside the secure area can see them. So, just send somebody through, and have them film a chunk of TSA screening with a cellphone camera, and send it back. Once you know what the TSA goons are seeing, it should help you figure out how to craft a package that won't attract their attention.
Never mind that there are about a zillion other ways to get a package into the secure area of an airport, which don't involve going through security screening. Like, pay off a TSA agent (how much do they make, again?), or an airplane mechanic, or somebody else who has access to the inner workings of the airport.
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Any and all passenger screening would be worthless
It already is, because the system leaks information that would make it trivial to find a way to sneak guns/bombs/etc. onto a plane. All you need is a sufficient number of people willing to go to jail (and actual terrorists are willing to die for their cause). You just keep throwing different approaches to packaging/disguising your bomb/gun/whatever at the TSA checkpoints until you find a reliably repeatable mechanism. Game over.
It gets better though... you could cut down on your search costs by taking advantage of the fact that - at some airports -the screens the X-Ray machine techs are reading, are sometimes (such as O'Hare, Terminal 3, last Friday night) aimed so that anybody inside the secure area can see them. So, just send somebody through, and have them film a chunk of TSA screening with a cellphone camera, and send it back. Once you know what the TSA goons are seeing, it should help you figure out how to craft a package that won't attract their attention.
Never mind that there are about a zillion other ways to get a package into the secure area of an airport, which don't involve going through security screening. Like, pay off a TSA agent (how much do they make, again?), or an airplane mechanic, or somebody else who has access to the inner workings of the airport.