Well 5 years ago my grandmother got pulled aside and got a good thurough pat down and all of her purse and carry on dumped out and gone through. All because her fake knee set off the metal detector after she told them that her fake knee was going to set off the metal detector and showed them a letter from her doctor.
When we got to our destination my suit case slid down the ramp and and exploded all over the floor of the airport because they had cut open my bag incase the zipper was boobytraped. They had just taken my suitcase and all my clothes and tied them off inside a big garbage bag. Inside was a card that basically said we are sorry but we had to look in your bag. because we destroyed your suitcase here is a $50 gift certificate towards samsonite. The stupid t-shirt I had bought on my vacation even had a big gash in it from where they cut open my suit case.
Now I only fly with a carry on.