The mods like to pretend that diverse perspectives are always welcome, flags are only for guidelines. Definitely not true. If your opinion falls too far out of the HN overton window you’re silenced.
I'm never as careful about what I say as I am on Hacker News.
Sad that free speech has been unceremoniously tossed out of the Overton window, and aggressive censorship is so widely seen as the right way to deal with bad ideas.