I'll try to answer each of your questions, but I think you may be reading something into my statements that is not there. I do believe that except for advocating violence, all speech should be free. But I am not saying that speech should be free of consequences. The questions you asked seem to imply that's my position, but it's not.
I'm super curious to know what the commonly agreed rules were about what could not be said. But wouldn't it have to be regulated regardless? You began your post by saying everyone previously agreed that certain types of speech should not be permitted..
Commonly agreed rules about what could not be said are those I already mentioned above. Rules such as those against shouting fire in a crowded theater or clear calls for violence. Today we have played games with language to call almost anything violence and then censor or take more drastic action.
Would it be "free speech" for someone to post your full real name, address, family photos etc on this website, or those of a sex worker, since there's no violence involved? What about Tweeting false information to manipulate a stock price?
Doxing is already legal. The case against it today is based on morality, respecting someone's privacy and fear of retribution. Stock prices are a different case. You can go ahead and spread false information about stock prices, but if the SEC finds you doing so to profit from it unfairly, there are specific penalties. Similarly, I'm free to defame you, but if I cannot prove what I say, you can sue me for slander or libel.
Who was banned from Twitter for this? I'm not saying it didn't happen... I'm just unaware... could you please post a link to some info about that?
Megan Murphy, Canadian feminist, received a life time ban from Twitter for simply saying a transgender person was not a woman. She's one of the most high profile cases, but there have been many others. Calls for the same to be done to J.K. Rowling have been made.
But Twitter has done far worse than that. Look up the case of Bret Weinstein, whose Twitter and Facebook accounts were suspended or stifled before the election (and still are), simply for proposing something he called Articles of Unity, a framework for opposing political sides to work together. There are many examples of such action by Twitter and Facebook, but the media doesn't give them a lot of attention because they are overwhelmingly taken against conservative views...Weinstein isn't even a conservative but he was proposing something that was thought to potentially harm Biden's chances. That was apparently enough to get silenced.
Why only violence and nothing else? Not hatred? Should it be totally "free speech" say to post on Facebook or Twitter the way "Back in Toronto" posts?
What about false information that arguably harms the public good, e.g. telling people vaccinating children will give them autism, or telling people that the vaccinations we need to end this endless pandemic are actually a way of Bill Gates putting microchips into your arms, etc. etc.
There should be no "hate" laws. All speech should be allowed save for that advocating violence, as I said above. Yes, you should be able to say you hate jews and blacks etc....even "BiT's posts...yes, they should be allowed. Free speech counts for nothing if it applies only to speech you like. You have to allow distasteful and ugly thoughts to be shared, to be aired, in order for them to be properly examined, discussed and hopefully discarded. Same goes for misinformation that could lead to harm. You should be liable for what you say and that liability could increase depending on the context. If neighbour Joe tells you not to vaccinate your kids because aliens will abduct them he will be less liable for damages than if your doctor tells you the same thing. It is up to you to judge what you hear and read and to consider the source.
One of the earliest and I think the best, explanations of this is
John Stuart Mills' chapter 2 on free expression in On Liberty. If you've never read it, or perhaps did in school a long time ago and forgot, you should give it a quick read. He lays out the principles and importance of free speech there in a wonderfully clear and persuasive way.
Let me just give you an example from my own beliefs. I
hate certain religious teachings. I think they're evil and I should be able to say so without being accused of transgressing a law. Judaism's circumcision, Islam's teaching that a woman's testimony is worth less than a man's, Catholicism's doctrine of original sin....I
hate them all. Note that plenty of people have gotten into hot water for doing exactly this, criticizing religious belief, which our courts have deemed tantamount to inciting hatred against an identifiable group. In all likelihood I would not be charged for saying publicly what I have said here, but I would probably be deemed to have technically broken the law as it's written--and if I held a position with the government, I'd be at great risk of losing it. Sections such as these landed Ezra Levant (not someone I'm a fan of), in front of Alberta's Human Rights Tribunal when he reprinted the Danish cartoons.
Section 319(1): Publicly inciting hatred[edit]
Section 319(1) makes it an offence to communicate statements in a public place which incite hatred against an identifiable group, where it is likely to lead to a breach of the peace. The Crown prosecutor can proceed either by indictment or by summary process. The maximum penalty is imprisonment of not more than two years. There is no minimum punishment.[15]
Section 319(2): Promoting hatred[edit]
Section 319(2) makes it an offence to willfully promote hatred against any identifiable group, by making statements (other than in private conversation). The Crown prosecutor can proceed either by indictment or by summary process. The maximum penalty is imprisonment of not more than two years.[15]
Sorry for the length of the response, but as you can probably tell, it's a subject I'm warm to and which seems to be touching daily lives more and more. In short, I think that the actions which should be available to us to fight abhorrent speech should those of social pressure and specific damage laws.