There are plenty of people who are declared insane and not competent to stand trial, that are locked up forever in hospitals anyway. I honestly don't care if someone in jail for life goes crazy or not, as long as they can't get out. Maybe solitary lockdown seems cruel, but it is far less cruel than killing, raping or assaulting someone. I don't believe in the death penalty, period. But I have no problem with locking up killers and never letting them see the light of day again.