Jerk
Got news for you, asshole, there are far better ways to protect yourself than pretending to be one of our dead friends. You want to keep your identity hidden, pretend to be a facetwin, fine, that's your own fucking business. It didn't have to be him. You could have made up a new identity and no one would have been the wiser. People have done it before. Why the FUCK would you do this?
It doesn't have to be threatening him physically to be dangerous.