I agree with you in the United States it is quite difficult, but the option is still there. In Canada we have for instance, the tort of intentional interference with economic relations, which I suspect would lend itself quite well to my "Protocols of Orcdom" scenario.
We have torts for intentional interference with contract, business relationships, &c. What I'm curious about is whether in Canada a fiction writer could be held liable for an "idea" embodied in their work, rather than for something like libel or other tort. My understanding is that fiction writers there could potentially run afoul of hate crimes laws, whereas such laws would be inoperative in the U.S. under the First Amendment. Is that an accurate analysis of how fiction writers might consider Canadian law?