That kind of thing made me give up trying to respond at all on the LDS threads. It got to be too time consuming after a while. I mostly just read the article now, and ignore everything after about fifteen or twenty posts.
Apart from their putative desire (which I do not "buy" as being the truth) to protect us and others from the Church's "evil" doctrine, what possible motive remains? Ignorance at best, or just plain evil, I believe....