If many people have admin access to Facebook page one of them can delete page, or remove other administrator.Is it possible to protect from that situation in some way (ie. master admin or password)?
Is it possible to protect Facebook page from takeover by other administrator?
facebook;security
Facebook used to restrict the original creator of the page from deletion, but removed that feature a few months ago. So, no, there's no master password or anything protecting against the situation you present.