I see how you could misunderstand my post, but you could have phrased with much less pointy words.
"What if he doesn't know how to make covers, Doom?" is fine, but "Did you ever think of that?" seems like unneeded aggression to me. Another thing that could be used is "I may have misunderstood your post". Maybe you didn't mean any aggression with "Did you ever think of that?", and since that is a possibility, I end with
maybe I'm wrong, your post might not mean that at all.
P.S. 999 posts!