Sometimes. As is often the case, there is evidence for both (banning/limiting, Chilling Effect, power pressure & scolding, etc), depending on the community. I

Sometimes. As is often the case, there is evidence for both (banning/limiting, Chilling Effect, power pressure & scolding, etc), depending on the community. In your second link, the topics were literally banned from the platform, rendering the question moot in that case.