Can you give an example of harmful speech that doesn't also intimidate? I think most speech intended to harm also ends up intimidating people, but there are probably exceptions that aren't coming to mind.
An extremist discussion board, say dedicated to harming some other group. They may have no interest in advertising their plans, their speech is used to coordinate attacks.
I think that counts as conspiracy to commit a crime, so it's already covered in the criminal code? I'm focused on trying to develop speech norms for speech that's not a crime. See https://news.ycombinator.com/item?id=33998327
Also: libel. It does harm, to the point that damages can be awarded, but it's not necessarily meant to intimidate the target, just to misinform others about the target.
