The solution, therefore, is that these centralized echo chambers need to be broken up into smaller pieces.
Those trolls, movements and "subcultures" were not started on r/all. They came from niche subcommunities which were effectively unmoderated before they gained media attention or from 4chan and all the other -chan, -booru, etc sites which already were exactly the kind of small decentralised, free-speech-above-all-else services you're talking about.
> The historic precedent for minimizing bad influences of cults is decentralization and distribution so as to prevent systemic failure cascades in case where cultish behavior is endemic.
If this is anything more than repetition of dogma then please explain how exactly this should be applied to the current situation. What should be done?