Does HN always tell you when someone flags it? Or just a critical number of users or something like that?
I see the flagged indicator now and then, but I see it somewhat less frequently than I would THINK things get flagged, admittedly that's all conjecture.
If something is memory holed quickly enough after being flagged, perhaps combined with an automated algorithm that considers certain keywords, then the likelihood of people noticing flagged posts can be kept very low.
Of course this is all speculation, the truth of censorship on various platforms will likely never be known.
I see the flagged indicator now and then, but I see it somewhat less frequently than I would THINK things get flagged, admittedly that's all conjecture.