>The most livable societies I know are all open societies.
If by "open" societies you mean societies in which no form of "censorship" is practiced by any entity, at any level, then no, you do not, because such societies do not exist. Even the United States has limits placed on speech at the Federal level (the level limited by the First Amendment) and elsewhere. Even public squares are regulated. And on top of everything else, society itself imposes "censorship" through cultural and social norms.
Certainly speech on private property can be regulated. You can't go into a restaurant and start campaigning or venting about the government. Platforms on the web, which are also private property, have always been likewise regulated by their owners. I guarantee this is the case in whatever livable societies you're referring to.
>Once you start censoring this you might also want to censor that and the misinformation here, and this doesn't sound right either... Maybe your own comment is misinformation.
Yes, the slippery slope argument, all forms of censorship must inevitably lead to arbitrary censorship something something Orwell something Stalinist purges. At this point it's been invoked so often that it's become something of a thought-terminating cliche. All I can say is I don't believe that the ability of site owners and moderators to police and control content - an ability they've had forever mind you - will somehow inevitably lead to the boot stomping on our heads forever. If you disagree we'll have to agree to disagree.
After all, as stated earlier, there are no societies in which no form of censorship occurs. If the slippery slope argument were valid, all societies would currently be dictatorships. That societies exist which you consider "open" suggests that
>Should I lobby for your speech to be deplatformed, as you call it?
Lobby whom? We're talking about the policies of specific private entities, you're the one who predictably brought up CCP style authoritarianism despite no one actually arguing for governments to "deplatform" anyone from society. But sure - if you think my speech is doing real world harm in the same way as Alex Jones or anti-vaxxers, feel free to "lobby" the mods about it. That would, after all, be your free speech right would it not?