I'm not sure that's true. I remember when "netiquette" used to be a bigger thing than it is now. People would lurk for a while before posting to get a feel for the community. Flamewars would happen if someone top-posted instead of bottom-posting. Debate still happened, and some of them would spiral out of control, but I wasn't nearly as afraid to mention my opinion about such a wide range of topics both on the web and in real life as I am now.

What accounts are tied to your real name? I don't use any facebook products so don't know about that, but don't know of any other that are tied to my name.

Enforcement of community standards has backfired in the form of weaponised censorship.

There's Google that uses your name but doesn't enforce its authenticity.

Anyway, I don't comment on any services that use a real name policy. I'd prefer that my name didn't appear on the Internet at all, but don't fight against it when it inevitably happens via some participant lists and whatnot.

Facebook, google, anything tied to your bank accounts, anything you access with your phone or from your home address, if any of those things you access use your email, anything tied to your email - which ends up being just about everything. Even if I might not know your name, there are probably a dozen big data companies that can tie your name to 99% of your web activity.

Even where there's some anonymity by using a user name, there's rarely anonymity from legal authorities, who can easily access your entire internet and location history - and a VPN won't help you, because those aren't secure.

This is all out of context.