Depends on your definition of speech. I’d say it’s possible in theory, but societies tend to avoid it, sometimes for (popular) social public benefit and other times for stability or power. The biggest one is that groups with power don’t tend to tolerate credible threats to their power.

This page gives a list of some restrictions on speech that tend to be common in many countries, so you would have to find a society that tolerates all of these and more.

https://en.wikipedia.org/wiki/United_States_free_speech_exceptions

No, and I don’t claim to support “free speech above all” nor do I think that “no form of expression should ever be removed”. I’m just pointing out the hypocracy that capitalists are so worked up about censorship in socialist countries but when they do it it’s suddenly okay.