This business of can "baddies" be rehabbed is related to the nature vs nurture argument in sociology. All the genetic markers, chemistry, etc. notwithstanding, the power of good parenting is now being scientifically quantified! (Chemical and Engineering News, June 2 2003 issue.)

Young people should be taught to respect all living things, whether by parents, teachers, older siblings, other relatives, or clergy.

I'll get off my soapbox now. I haven't got on one in awhile.