I guess it's all those people who are just googling around and happen to come by this site. They think their question is of the highest importance and needs to be answered right away. Therefore, they do not really read anything on the site and post in whatever forum is the easiest. Which just happens to be the first forum, the Apple Rumors forum.
At least that's my perspective of the situation. I also see one time posters who post the most ridiculous replies all over the forums. Some things you can just never understand...