Sadly, within reason, it's Facebook's rules on their site. So if they decide to remove your content, too bad as there's probably something in the agreement you blindly ignored when you signed up for it, which says they can do whatever they like with whatever you post to their site.
I use it as a useful tool to promote my work and my business but never be fooled, they are not interested in giving me a platform to promote even though I pay to advertise, they're more interested in strapping us all down and force feeding us everyone else's content.
Always remember that nothing comes from free in online social networking, "If one dances with the devil, then one must pay the piper."!