What tjohn said.  Posting a notice on your page doesn't in anyway change Facebook's policy toward you.  It is their website and they have stated their TOS and intentions.  

Keep in mind once you place an image on the web it is available to anyone as a screen grab.  When I post a photo or image to Facebook I reduce it to no larger that 800 X 800 pix.  If anyone jackes it and wants to enlarge it, it will be pixelated. 

Sidebar..  anyone using Google+ or any of its affiliated domains need to read their TOS..  Pretty much if you post it, they can use it anyway they wish.