Look at it this way. Half of the "security" personell are high school dropouts who can't do anything else with their time, and get a nice feeling of power by making stupid rules even stupider.
As was already pointed out, all of this security is aimed at making people feel safe. It doesn't actually do very much except annoy people.
__________________
"Good people do not need laws to tell them to act responsibly, while bad people will find a way around the laws."
--Plato
|