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USENET, the OG social network, rises again like a text-only phoenix
(www.theregister.com)
This is a most excellent place for technology news and articles.
Most clients would allow you to filter out what (or who) you personally didn't want to see, without having to censor it. Actually not a bad system: allows both freedom of speech and some kind of "moderation". The system could of course be improved, e.g. by having some default, mod-curated server-side filters that users could opt into, but people would still be allowed to see the whole uncensored content if desired.
Exceptions could be made for illegal content (e.g. pirated stuff), where it would be deleted server-side by the admins (illegal defined to be "in the jurisdiction where the data is stored").
Freedom should not be taken for granted.