Let us not, because pretty much all communication platforms have been moderated in one way or another for all time, even on the Internet (Usenet excepted, which I’d argue hastened its decline; and even then, a lot of news servers wouldn’t carry the crazy groups). There’s plenty of history here already and it seems pretty clear that it hasn’t had catastrophic effects.

As I said elsewhere, if an actual problem arises, fine, let’s do something about it. But that’s not the case today. There’s just no indication that Facebook is going to block mainstream political speech anytime soon. If you find a real example of that, raise it, and I’m sure it’ll get a lot more attention than from just the free-speech absolutists.