We need more media literacy around HN and Reddit. You just need a few users to upvote something, and people often respond when they see the opposing view (this is why conservatives and liberals in the US so often take the most extreme statements on the other side, and critique/retweet them; better engagement and an easier way to caricature the opposing side).
It's interesting to think about how different posts attract wholly different tribes, meaning HN is hundreds of sub-groups not a monolith. There might be a post on a Ruby gem, and the entire commenter group are Ruby-ists who hold common views on opposing languages. You might see this as "HN believes X", but instead it's the subset of people attracted by that post that you're really interacting with.
Will add this as an example to my media literacy guide for engs: