You do not have any right to fans of a Facebook page that is dedicated to you or your product, that was created by someone who is not you or acting on your behalf.
There have been cases where companies have tried to seize control of unofficial fan pages and take them over, as if they were somehow entitled to the community that was built by someone else. It’s so wrong.
Some are trying to use trademark or copyright law as a means of bullying their way into these pages and, in doing so, they risk damaging those fan relationships. In fact, the bullying itself is rather hard to understand because in many cases, they are essentially treating their customers like thieves. Completely the wrong move.