Perhaps a fitting punishment for these losers who just like to kill something just to kill it would be a summer assigned to a crew picking up all the road kill carcasses along the highway. I suspect a couple months of this activity would have them where they never wanted to see a dead animal again, aversion therapy.
I ran across a backwoods intersection a few years ago that had dead, rotting deer stacked up like cord wood. The pile was layered with that years kill piled on the previous years and so forth. The deer could have been from crop depredation permits but it was still a horrible waste.