You missed the point. It’s not that they’re afraid to tell you. It’s that shadow censorship is a more effective way to silence the unwanted speech because the speaker doesn’t know his message is not getting out.
I suspect the real problem is the user that posts something will always see it on their screen and yet the others linked to that thread will not see it.
That user posting it is left believing that they are alone in their thoughts when nobody else is even seeing it on their screens.
Worst methodology out there. Like being invisible in a room and not knowing it.