But Facebook (and Google, Apple, and many other "platforms") are such an indispensable part of our lives that we should have difficult conversations about what individual rights look like in these quasi-public private spaces. (It's worth noting that the explicit business model of many of these companies is to create gigantic platforms/walled gardens.)
I personally do not believe that many of the norms and common law relating to physical public/private spaces should be transferred to the modern age of digital oligopoly.