I’m not arguing about the system as a whole. I’m neither informed enough, not passionate enough to be cogent or loud about it (respectively).
I will say that if you think the potential existence of threats that bypass security completely invalidates security efforts, you’ve probably got a lot of computer security software to uninstall.
And if you want to avoid screening old ladies, you’re gonna have to rely on gender/age/ethic profiling and the efforts of the CIA and NSA, and to convince everyone that doing so would not lead to social injustice. Good luck. (That is to say, whether there’s a common sense solution to screening the wrong people or not, there are social factors that make its implementation far from simple.)
