The FF section is not the only section that has this problem, it's no different for many other sections, so we are not going to just allow you to spam people's threads or make a new box on the main page just for that.
There's no real difference in someone saying "I made a terrific theory, but it got lost in the large amount of threads that get posted each day" and "I made a FF, but not many people read it because they can't see it". So allowing FF to spam people's threads and punish other people for doing so, is simply not fair. We are not going to allow something like that and there isn't any room free for a new box in the hypothetical case we would make a box only for FF, so we would have to remove one of the existing ones.