The only reason you can even post here is because HN stops spam and DDOS attacks. Your entire post is only possible because there are limits on free speech.

Free speech has always had limits...

Well maybe in the eyes of US law, but what that's not a given for, well, me or perhaps others on HN. Take "the US highway network" for example. It can just as easily be used to transport black-market items, child porn, weapons, drugs, etc as it can transport ice cream bars. I support it. Tor just as easily supports drug sales as it does star-trek reviews. I support it.

Can't say for sure, but I think it's hazardous to assume we all prescribe to the exact same notion of the limits on free speech.

Oh, it's not just the US. Other countries have restrictions as well. Societal norms impose restrictions too. Unless you're an anarchist, there have always been (and probably always will) be restrictions on speech and free speech is typically meant in the domain of political speech.

Even anarchists believe there should be restrictions on speech. Just not that the power to restrict speech should be concentrated.

The way humans socially operate inherently restricts speech.