when you think about it, in the world, there are good people, and bad people
if every one of those bad people were to be killed, there would only be good people left, which would make is so much safer and such a better place, so i think its a great idea, shame they wont do the same here!
You can't have good without bad, the idea is relative. If you started to remove bad people the definition of bad would change, until eventually you'd be killing people for things like littering. No one is perfect, everyone has done something "bad" at some point, you'd end up killing most of the planet.