I take from what you say as touching on something I've often thought, we're treating the symptoms of an example problem as though it was an epidemic. I think that there are two sides to the security theater, what they show, and what they don't. I think that these devices will catch people sure, and make a great number of people like yourself sort of a comfortable indifferent, but I do believe that there is indeed a total package of risk management, and these public faces of the effort is just the tip of the iceberg. The evidence I have of this is when I went to Mexico one time and my significant other bought some kind of pill with my card. They could care less about me at the border, they went for the exact pocket of her purse. It took a matter of minutes, and we were on our way. I have some theories about how they might have done it, and I'm sure it was simple, but it is by no means obvious (maybe my CC info? the way she carried herself?) exactly how it was done.