The corrolarly of this absolutist perspective is to allow Twitter/Wikipedia/Arxiv/Facebook/HackerNews to become 8chan, which is a reductio ad absurdum of your p

The corrolarly of this absolutist perspective is to allow Twitter/Wikipedia/Arxiv/Facebook/HackerNews to become 8chan, which is a reductio ad absurdum of your position that all ideas are equally valid, objective facts can't be agreed upon (or perhaps don't even exist) and one can't possibly design a good moderation system. I reject this position on purely empirical grounds, simply contrast the tightly moderated HackerNews with the unmoderated sewer that is 8chan.