Yes, that was my sense, as well: firstly, the terrorist fear tactics are ridiculous, but secondly, if terrorists ever were to use these things to smuggle weapon

Yes, that was my sense, as well: firstly, the terrorist fear tactics are ridiculous, but secondly, if terrorists ever were to use these things to smuggle weapons into the US, our drug policy would be at least partly to blame: drug producers and distributors are the best-funded organizations in global organized crime, they're probably the only ones well-enough-funded to develop this kind of technology, and they owe their wealth to demand induced by America's idiotic war on drugs. Now, though, it's too late -- the technology is out there for anyone to buy.