And I'm sorry for the upcoming little rant, but whoever thinks they're anonymous while using a Meta(or any Big Tech platform, really) product is an idiot, tech literate or not. Not even places like 4chan have true anonimity, depending on the place & jurisdiction we're talking about[remember the case of the guy making a call to violence(illegal) that got arrested]. The 'traditional' web is not anonymous at all:not only the underlying protocol(s) is/are inherently not anonymous by design, but you add insane surveillance and you can eventually crack anything. Even things like TOR/others are not truly anonymous, and the US regime proved that if they want to find you, they will, assuming they have jurisdiction.
Coming back: I don't quite get why people talk about free speech in this context. Not only S230 is a broken f&ckfest but we're also talking about a non-US place. What's more hilarious is that even if we would have talked about the US, defamation (w/ calls to violence & other speech not protected by 1A) is still illegal.