I used to have a bit of an interest in recreational lock picking. I had a few TSA-approved locks that I liked to use as demonstrations to friends, because they

I used to have a bit of an interest in recreational lock picking. I had a few TSA-approved locks that I liked to use as demonstrations to friends, because they were so trivially easy to open. They would pop open after just a few seconds of jiggling anything at all around in there, so they were great at building people's confidence that they could learn to pick locks, and that locks are just puzzles, not magic. This is the only time that I've ever considered the TSA locks to be useful for anything at all.