The abuse button is generally used to keep this site free of posts that are just unacceptable, of course the moderators and owner have the final say as to what is unacceptable, the abuse button is only able to bring their attention to a particular post. When used properly it is to protect the overall site integrity, not to settle scores or “tattle” per say. In my opinion it is what keeps this site civilized as opposed to some sites that are chaos.
Not chaos for the moderators, because the don't have moderators.