I could do it no question. I can think of 4 people ive seen in the papers who have done terrible terrible things that i think deserve death for defiling our world with evil. Im not religious i just have a strong sense of justice. I would never take the life of anyone who didnt completely deserve it for being a blight on the world and contributing nothing but pain. A school bully does not deserve death. Someone who demonstrates a hatred for his fellow man and displays no morals is someone i might consider taking the life of. Killing is the lowest thing a man can stoop to, its what animals do to each other when they fight, we will not do the same. However some people deserve nothing less.
Anyone i know? No. I know some douchebags but i would never kill anyone like that, i like to think 99% of people have a core of virtue somewhere, it isnt ethical or right regardless if i get punished or not.