I was thinking something along similar lines as to what the Laws are. These people, through some event, became exceptions to physics, as if they were bugs in the code of the universe. Much like a badly scripted game, the universe is a finely tuned machine, but these exceptions (which I think is quite a good term to give them since Law-user doesn't sound very good), are somehow skipped by a certain section of the code. You're right. This kind of thing is very hard to explain exactly what you mean :D