"TOS != legal right to block access to public data." You seem to be arguing that Facebook should only be able to choose between "everything goes" or "hidden be

"TOS != legal right to block access to public data." You seem to be arguing that Facebook should only be able to choose between "everything goes" or "hidden behind a contractual login wall". However in the U.S. the Computer Fraud and Abuse Act requires computers to be used only with the owner's authority. The key is that authority can be conferred by means other than a formal contract, and instant monetary damages apply only to access control violations. This is good! It lets you use public services without a barrier to entry or legal risk. If the provider does not like it, they have to suck it up until they find out who you are. Then they can order you to stop, and if you stop the matter is over.