Actually, even in "fullest freedom of speech" places like the US or Canada, that does not extend to actionable threats. If you threaten a person in a context where they actually think they are in danger, that's a crime.
Free speech also doesn't apply to harassment in pretty much any country. If it did you could never have something like a no-contact order on an abusive ex-partner, for example.
At the very extreme end, free speech has plenty of limits even in the West. CP, snuff films, grooming, non-consentual distribution of sexual images, incitement of violence, etc are all illegal. For obvious reasons.