It is literally 0% effective. At least for what they claim to do. What they do will only stop a dumb criminal, like one who couldn&#x27;t even blow up his own underwear. But against any sophisticated terrorist, it will do nothing.
But is it a deterrent? For what? How many people are going out and hijacking or blowing up planes? Now, or before?
Pretty much all it does is waste time and money.