I've been on the internet since it started and every forum I've been on has removed users and or posts for a wide range of reasons. Including just being rude, as hackernews does. So I don't really see this as any kind of "free fall". It is just the usual way of things.
It's not the usual way of things. They're not removing a few individually flagged post. FB is erasing massive numbers of communities, many just because they lean right. Reddit deleting over 2,000+ subreddits in the past year is just business as usual?
No, that's fucking targeted attacks against opinions they do not like. This is absolutely not business as usual. Everything about this is massive and it's morally reprehensible. It may not be illegal, but it's fucking wrong and insane.
It also shows that Big Tech is afraid. They're afraid and they're cowards. Regulating speech and language and blanket censorship are tools of authoritarians, not of people who believe in democracy and liberty.
Show me a single nation where censorship lead to a more free and open State.