I really dont care if the death penalty is a deterrent or not, its a good way to work through the scum....if there was a mad dog loose you would shoot it, wouldnt stop another dog going mad but hey, who gives a shit?
The goverment will happily kill thousands of head of cattle without a backward glance, but say you want to blat a peado or mugger or rapist or skag head and the whole world starts crying. LOL