Let's do a reality  check shall we?  Some, not all, mentally ill people wind up incarcerated and oftentimes go through a revolving prison door.  DOC has a lengthy list of these types of characters. Go checkout API.  Yeah, people that don't give a damn about life typically have a criminal history.  But than again, as long as you look around your living environment with rose colored glasses you won't see much.  It's not hard to gain knowledge and rational thought.  Really.