You misunderstand me. Its not about punishment, or justice, or anything. Its about removing an element from society that clearly can't live WITHIN a society. Pardon the link here, but its like Joker and the Batman. The Joker is irredeemable, but society refuses to enact the death penalty on the Joker and so each time he escapes he kills more people without a care and Batman just puts him back in Arkham. We keep the Joker alive in comics because it makes a good story, but why keep someone alive in real life with the same issues. He walked into a theater armed to the teeth with tear gas! Why kind of person does that? Raise your hand if you think you can rehabilitate someone like that.