If you ever doubted that the lock on your door was in place to keep out the kids, doubt no more. This fascinating article details one of the world's top lock pickers.
A good friend of mine has been picking locks as a hobby most of his life. This is a skill that can be learned by any bright, patient person.
It's a safe bet there are more people around who know how to pick locks than there are people getting paid to rethink the lock and key.