He shouldn't confuse other ppl it's like he doesn't care he's made problems. You're trying to protect random ppl from getting wrong info so it's upright concern but you can't stop him in reddit or bitcointalk. You can't use ignore button because you don't want someone's lies turned into facts & you can't reply to his posts because you'll provide more opportunity to misbehave. It isn't easy choice if you stop intercepting him but it's his freedom of speech so he won't stop.