Good question. Security is one thing, certainly. But, I wonder if they're not going just a little too far.
I heard from a friend that she had to surrender a pair of tweezers at security, last week. What's she going to do? Threaten to pull somebody's eyebrows out one at a time? Poke somebody's eye out?
Heck, in the right hands, a shoelace could be deadly. Perhaps we should enforce a loafers-only requirement?!?!
McGyver could make a bomb out of lipstick and a tampon, couldn't he?