No, it doesn't. It happens because HN shadowbans people who have the wrong opinions. dang and whoever else would say that's not true, but it's tough to debate, because the evidence is conveniently hidden by being unjustly flagged. It's tough to point to a comment and argue that every statement in it is indisputably true, relevant, and polite, when it's been hidden from everyone by some anonymous user without explanation or justification.

This kind echo chamber maintenance goes on day after day, while HN delusionally prides itself on curiosity, civility, etc.

I don't see banning on opinions happening on HN, but I understand that seeing the same rehashed fallacious statements over and over gets old quick. Case in point: the "this is not happening because something similar happened before", with no quantification or data or independent research or citation... is just noxious bullshit that deserves, like I wrote, to get you a red username, not green. What's your favorite color?

Well, I'm glad that the site moderation has no patience for QAnon BS and I hope they keep it this way

Reality is not just "your opinion man" as several people dying with a tube down their throat are figuring out now.