Not saying that's logical, but it's something the airlines have to act on. They have policies in place that they need to follow, and even if it's a finer comb than it needs to be it's better than having no policy at all.

People forget how many skyjackings there were in the 80s and 90s when they say airport security is worthless. Like "How many incidents have they prevented?" "Only all the ones that didn't happen..."