Perhaps something running on Sandstorm will make it easy enough for people to run their own nodes.
I think Kenton is onto a winner with Sandstorm - it stands half a chance to actually unify different blogging platforms. So while you may use a different blogging tool and comment - you have a unified email-like identity that follows you between tools, nodes and networks.
Social networks have the funds to hire these people: http://www.wired.com/2014/10/content-moderation/
I'm doubtful about how long Sandstorm would be able to stay strictly hands-off. Sooner or later everyone who allows random strangers to interact has to get into policing the content and that's nobody's idea of fun.