Have you created a Facebook page and appointed someone as the admin? If yes, then you must remove the admin right now if he is not a trusted one. I did this mistake a few weeks back when I made someone as the admin, not realizing that the admin can hijack my page and remove me from the page I created.
This is a Facebook Security Flaw which lets Page admin remove the creator of the page as an admin. You might argue that if you make someone as the admin of your page, he/she must get the same rights which you possess. But this is not true according to an FAQ on Facebook which states:
A Page can have multiple administrators. Each Page administrator will need to have their own business account or personal account. Every admin can manage the Page from their own Facebook account using the “Page Manager” application that will appear in the left hand column of the Applications section once they become an admin for a Page. Every admin has equal access to and the same abilities as the other admins for a Page, however the original creator of the Page may never be removed by other Page admins.
Facebook pages are an integral part of Business and play an important role in Brand building or promotion of Business. Hence, this becomes a serious security flaw which, perhaps Facebook is not aware of.
The video below shows how a page admin can revoke the administrator rights of the page owner.
Facebook Page Security Flaw