Or maybe to protect against that, there's a strict moderation governance document for that to the effect of "If it's not illegal, it flies". That could still get rough since there's lots of non-illegal content you could put on there which people wouldn't want to see.
Independently hosted nodes still feel like the way to go to me. No hard authority, just people talking with people and moderating to set the tone they want for their community. If the moderators are jerks, moving to a different node should be easy (thus putting the power into the hands of the users to abide by the governance they find most agreeable) and not cause you to exile yourself from your civic community.