Earlier quoted context omitted.
My point was, that it is hard and the lines are blurry. But actually I do believe in the concept of unrestricted speech. But I really don't know when was the last time, that was tried. There were times, when certain topics were ok to speak freely about, like racism, yes, but at those times other topics were restricted, so what exactly are you talking about?
Do you know anywhere with truly unrestricted speech? The US has the freest speech that I know of (granted it’s also the only model that I’m so familiar with), and even it has plenty of restrictions: https://en.wikipedia.org/wiki/United_States_free_speech_exce...
And no, shouting “fire!” in a crowded theater is not illegal and is protected by the First Amendment.