I think we're going to reinvent Google's "circles" mechanism from G+. We all (well, the terminally online, at least) are going to be part of several more or less overlapping villages, and the people in those villages are going to trust each other to not be bad faith actors. Everything else... everything that tries to scale... everything public... wasteland.
Something something Dunbar's number, Tragedy of the commons.
Something something Dunbar's number, Tragedy of the commons.