Would you consider Facebook preventing a user from posting to be "banning" or "censorship"? Even though they can still post on, say, Twitter?
Also, you didn't answer the question: would Facebook removing my ability to post be considered "banning"?
Every library removes books. It is the most normal thing, my library has regular book sales where they let books go. If you want to call distributing books for low prices "banning them" I guess I can not help you.