The issue isn't just about the internet echo chamber though, it's a more fundamental thing that people seek out news sources and opinions that reinforce their own biases - totally the right thing to tackle, but it's not just about internet communities.
Be wary of overly technical solutions for what are essentially people problems. Technical solutions can be useful tools for moderators but removing too much human judgment from the process creates more problems than it solves.
This is an interesting space to me. I hope to write more about it in the future. I think I have done one blog post (on my current personal blog) on the topic of moderation but I have been a moderator a few times and have done some A/B testing of different approaches. But I still struggle with how to talk about it to other people, who often think I am just full of hot air.
