I guess is the goal for everyone to join in some sort of majoritarian social contract? Being a lgbt person growing up I didn't interact in my local small community at all, because there was a damn good chance the local community would band together and mob me for being what I am. Finding a group of people I can identify with probably saved my life, literally, if not from some band of bigots than depression and suicide.
The rule that seems to be working itself out is this: people can pursue any interest they want, but we have social contracts when those interests interact with other people. Groups converge and have little friction when many people share at least some of the values, so you get things like HN, reddit, etc, but not unmoderated.