Well, what is "moral" is relative to one person or another. There is no universal morality.

So, in my opinion, I'm against the death penalty, for the same reason as D3v. I don't think that killing someone to teach the lesson that you shouldn't kill other people makes a whole lot of sense. I think there are better ways to go about just about any situation other than killing someone. I can't think of anything that I think the punishment for should be death.

However, if someone is threatening the life/lives of another person or multiple people, I'm not against using lethal force if necessary, but I think that's bordering on another topic.