Basically I want a mailing list feature, but one that mimics Reddit's UI. We already do this with websites (there are registrars and DNS servers that aren't controlled by any one organization), so why can't we do it with content? Share content with every instance as it's posted, as referenced by a "DNS server"-like setup, and bam, done. Each instance can moderate the content how they see fit, and if one instance decides to be dicks about it, users can switch to a different instance and have literally the exact same community and the exact same content as they had before the previous instance owners became dicks.