Stop propagating flame wars. Why can't we just have civil discussion anymore?
You know, I find it's best in these situations to state what you believe is right and then just stop responding to someone who is annoying you, either by dismissing them from importance or by actually adding them to an ignore list. You should try it. It's very relaxing and therapeutic, for you, the other person, and all of the people who have to sift through the nonsense to get to meaningful conversations.