i just thought of this but for normal murders, not mass killings with suicides after, we could implement a harsher punishment. im not saying this is what we should do but it is an idea. we could revert to the olden days method and go death for a death. if murderers were all executed as they once were, you CANT tell me people would be less reluctant to want to go out and kill.
While i agree to an extent i think the problem here is the "justice system". The way lawyers argue insanity issues etc makes this hard to achieve. While i firmly believe that someone who takes a life deliberately should have theirs taken i think it would be hard to achieve.
I also think that most people who murder do so with the thought of not being caught anyway so it may not deter them.
my names's Petey and i have gigantic balls