There already are, and have been tools to protect peoples work... one is called DMCA...
I think if people want to protect against piracy/plagiarism, they need to simply report it to site admins or file DMCAs. It's their responsibility to take care of their works, and shouldn't lead to punishing every citizen, and potentially every internet user in the world.
I can really start to imagine the US in the future as being like North Korea, where nobody is allowed internet except the government higher ups.
Wait wtf, who the hell are you