You guys that say to kill him need to lighten up. Not everything is always as it seems. Instead of looking at what the possibilities of what he ISN'T doing, try thinking about what the possibilities of what he IS doing. Just because afk doesn't ALWAYS mean lazy, he could've had a minor emergency and had to get up and afk, you have no idea and would feel terrible (hopefully) if that was the case.
Let them do it, take time to be kind, they will get a reputation of doing that and won't be welcome in any game after a while.
NEVER would I purposely let someone die. SC, I suppose it doesn't really matter. I play HC and would never do that to someone, regardless of what they're equipped with. That's terrible and for those of you that are saying kill him should be ashamed of yourselves.