[mmbaghdad]

I think a better step for twitter would to be decentralize the admin powers to its users with better blocking options (blocking on chosen words, regex for racist memes?), but in this case there will be the possibility that you're just building more echo chambers. One could only wish that one day an AI would be able to analyze a long incoherent rant and distill it to some debatable arguments.

[soyiuz]

I love the first part of your comment: something like Reddit communities (subreddits) with their own cultures of moderation, but on Twitter.