I've known that to for years. However, it seems just dumb not to employ a better method. You don't need to treat everyone as a threat.
The automated system seems like the best choice cause it can group people for better operations. Then it allows the screeners to narrow their energy onto specific groups.
I still like GA style security. Everyone looks out for one another and we all know what's not right. However, we know when it just a curious person wanting to get a look at some cool aircraft. I can walk up to any aircraft, even military, and look around. I'm not a threat, I'm a fellow pilot curious about "your" aircraft.