I'm not much for the Daily Kos website. That doesn't mean, however, that I'm above quoting them if it helps me make a point.
Slippytoad makes the point that use of "Dear Leader" as applied to Obama suggests that the invective is being hurled by a right-winger. At first I thought that some part of the "left" might be using that as well. I haven't been able to find that, and indeed "Dear Leader" is a favorite epithet of the right.
As the New Yorker cartoon put it: "On the internet, no one knows you're a dog." They also don't know if you're on a website to be productive or to be disruptive.