Ok, so who's going to accurately quarantine misinformation among the trillions of posts being made by billions of people? How many moderators does it take to do that effectively? Likely a few orders of magnitude more than facebook employs.
Anyways, no "public liberties" are unlimited. All are constrained where leaving them open creates significant harm or burdens other people's liberties. Even free speech and freedom of association.
People understood that once. "All my freedoms are absolute and who cares if society falls down with them" is a modern construct and it seems pretty plain to me that it's resulted in a lot of problems.