Moderators have no control in merely clearing out the submitted spells. Those who have posted the spells have to be the one's who delete the spells and rituals/articles. The coven leaders may or may not be able to them, but if they can it is highly up to them to handle the matter; two which they have a right to chose to or not to delete any thing. The Administrator may be able to go through the spells and articles and delete submissions, but that is far too much work for one person to handle and Pet has more than enough work on his hands for running a website as is - aside from personal life.
Down-rating is a good idea but can only go so far. Any one can go in and rate a submission to a higher ranking. You have to take every single submission into account no matter what the rating is. There are many spells and articles that are high and low ranked despite being fake, true/real, written politically correct, poorly written, followable, incomprehensible, etc. So when finding a spell to cast in the spellbook, it is suggested against subjecting your self to simply what is highly ranked - such as four or five star rankings. Now back to the taking care of them. Aside from what has been said, you can also mark a spell as Spam. There is a button for it twards the bottom right of the page when viewing a submitted spell or article. So unless you your self can delete them, down raring and marking as spam is all you can do.
But don't merely do so just because you think it's fake. There are some spells in the fantasy section that are real: such as the dragon spells. Even spells to change your eye colour can work despite it not being an actual physical change; it's an illusion, but still works as the illusion. You need to take every amount of detail involving what has been submitted into consideration. This is why there are Editors on the sight. People who know exactly what to look for whether it's required of them or not to do so.