Ask HN: Why are some topics automatically down ranked?
Today some very important person won a rather important prize (I don't tell the names to prevent automatic down ranking of the system). I and (as I saw later) at least one other person posted the news that was in the press.
But just one or two minutes later, both posts where vanished. I also looked 100 or so posts deeper, gone!
I also posted a similar message again, since I thought that it was a system error. The same effect -- after less than one minute, the post vanished from the list. It is very unlikely, that the post aged so fast by the normal ranking mechanism. The other post also got one up vote from me, so it is even more unlikely that it vanished from aging.
I don't know, why such posts are suppressed and what is going on. It is at the border of censorship in my opinion. Of course it could be some mistake, because similar news where around for some time ago -- but this news, I am talking about was definitively new and relevant!