There are no prohibitions of changing the subject in society. There are no prohibitions on talking politics. There are no prohibitions on talking about abortion. There are no prohibitions on wearing Donald Trump's face on a t-shirt. There are no prohibitions on wearing anti-Trump slogans on a t-shirt.
I don't know that I agree with that. In pretty much every parish I've ever been a part of, it was understood that the priests were not to talk about most of those topics from the pulpit, or that they were to do so only obliquely.
In job interviews, many of those topics would be considered gauche to bring up, would be forbidden by HR, and under some circumstances might actually be illegal for the interviewer to ask about (at least in the US).
On this iteration of ESPN, those topics are, in fact, prohibited by management. And it seems that more people are appreciative of this than aren't.
We could come up with more examples. Not all are necessarily "prohibitions", but all represent a pretty strong social pressure, at least, toward keeping some parts of our lives apolitical. This seems healthy to me.
I for one, have felt that politics has been leaking into on-topic threads increasingly over the last few years, and I'm happy to see that the admins are addressing it. I also have a vague recollection (maybe wrong?) that the old forum system automatically stopped bad language, so the manual moderation of this seems just like a return to normal, no?