[flomo]

The whole 'free speech/minimal moderation/no-censorship' is one of the core reason Reddit 'scales'. Unlike most sites, there's no sign out front saying you can't post there. No matter how terrible you are, someone will agree with you, and if you find the right sub-sub-sub-reddit, everyone will agree with you.

The other aspect is that voting systems are groupthink systems. Once the userbase gets large enough, the moderation system does not function in a way that encourages debate or questions common assumptions. It seems to be a terminal problem, which nobody knows how to fix except to escape to smaller fora.