Originally Posted by eyecue

I have seen it work. The problem is that it is not a universally known, tangible process and those that are not educated about it dont understand how it works or why. TSA did gather stats on it in the early years. I dont believe those were ever published. Has it been misused? Probably, just like the police abuse radar for traffic enforcement. And lets not forget to take into account the interviews might not have been answered by those employees that are most versed in PC answers.