We need to be talking about the political implications of what we've built, and figuring out how to fix our mess. This is like the period before the hurricane: everyone should be busy boarding up windows, and you can't do that if you decide you're just not going to talk about the coming storm because it makes you feel bad.
HN is one of the few places where informed discussion is actually possible and even opposing views (as long as they are objective and well reasoned) are adding to the discussion (and often upvoted). Shutting that off just because of some unfounded downvotes or trolling in times where such discussions are extremely important is cowardly and a very sad move in my opinion. HN is better (and more important) than you think.