Blocked Links

Why Should facebook block your genuine website Link? what determines weather a website link is spammy or contained abusive content? And can someone tell us why genuine websites are being blocked by facebook on claims that they are spammy or contain abusive language. My website is a .com I have hardly shared any link to it on facebook, but recently I was shocked to find that my genuine website link has been blocked. Why? Why? Why?

Facebook blocked my genuine website on very unfair grounds. it all started when i registered a domain and decided to host is with hostgator.