I was raised around and with guns (hunting). I was properly trained how to properly use them by my state's DNR, my father, older brother, uncles and cousins. I have never injured anyone with my guns nor caused anyone to be injured by my guns. With the exception of some minor traffic violations I have no criminal record. I pay my taxes and obey all laws (except, again, a few traffic laws) and rules of society. I have a very strong sense of right and wrong.
So, explain to me why you think it would be wrong - leaving the legal issue out of the debate - for me to own, for my personal use, a fully automatic machine gun.