I think some people don't know better. Nathan Bransford had a post about the dangers of impatience. Some people just aren't able to slog through editing, they have one draft and they want to be done. I doubt any of these authors want to be "the one" that becomes blog fodder, but they haven't invested the time to know better. Maybe the rejections will work. Or maybe we need to break out the clue-by-four.
I love it!