Absolutely nothing you stated is legal now. The government would not have to intervene asking for censorship in any of these cases. They would press charges and have a court order to remove the non-protected speech.
Sure, I didn't mean to suggest that those things are legal. Just giving a few examples of speech that is harmful, rather than merely distasteful.
> The government would not have to intervene asking for censorship in any of these cases.
Hm, I think that may be pinning quite a lot on some questionable definition of "censorship."
In these examples the law would be banning some specific speech from me, Pfizer, and the mugger, and punishing us if we engaged in that banned speech anyway. Isn't that what censorship is?
Your first two examples are fraud, not speech. Your third example is speech, but if you remove the mugger and have a friend say the same thing to you it becomes a joke.