They're called criminals and commit stupid acts... because they're stupid. I don't mean to say that they can be taught to be productive members of society, I mean they are actually stupid. However, I disagree to killing them. The best lesson about life is working them in hard labor camps. There are too many highways that need cleaning and I'm pretty sure there are some other less desireable jobs out there that the common US citizen isn't willing to do. I simply don't understand why we let someone sit in a jail, not contributing anything back for their stupidity, yet cost us so much. Nope, death is too easy; hard labor is equitable.
Besides, we could teach folks out of a job to use a shotgun and to watch these criminals working on the chain gang.