I do not believe that free speech is compatible with social media. None of the social media platforms are public squares. They are all private. For instance, sh.itjust.works has the “no bigotry” and “be respectful” rules which disqualify us from being a free speech platform. Doxxing is, in and of itself, not illegal, and yet it's not allowed even on Twitter. Most places are not friendly to porn, either.