Warren Ellis muses, “What would Twitter look like if everyone had private accounts?” He gets the flaws, of course, but he’s also not wrong that “not every social occasion is a street party [for] all-comers”. The problem isn’t so much public-versus-private accounts as Twitter’s lack of tools for user-driven community building. The test-balloon of being able to control the extent of conversation on one’s own tweets at least partially considers this, but one of the things we lost in the cultural gold rush to social media was the primacy of intentional and circumscribed communities.