Here's an anonymous account of a US Army soldier returning from Afghanistan who watched as his buddies -- who were all carrying high-powered rifles, pistols, etc -- were forced to surrender their nail-clippers and multi-tools:
So we're in line, going through one at a time. One of our Soldiers had his Gerber multi-tool. TSA confiscated it. Kind of ridiculous, but it gets better. A few minutes later, a guy empties his pockets and has a pair of nail clippers. Nail clippers. TSA informs the Soldier that they're going to confiscate his nail clippers. The conversation went something like this:
TSA Guy: You can't take those on the plane.
Soldier: What? I've had them since we left country.
TSA Guy: You're not suppose to have them.
TSA Guy: They can be used as a weapon.
Soldier: [touches butt stock of the rifle] But this actually is a weapon. And I'm allowed to take it on.
TSA Guy: Yeah but you can't use it to take over the plane. You don't have bullets.
Soldier: And I can take over the plane with nail clippers?
TSA Guy: [awkward silence]
Me: Dude, just give him your damn nail clippers so we can get the f**k out of here. I'll buy you a new set.
Soldier: [hands nail clippers to TSA guy, makes it through security]
This might be a good time to remind everyone that approximately 233 people re-boarded that plane with assault rifles, pistols, and machine guns-but nothing that could have been used as a weapon.