For any given P2P system which can be used to share a large amount of files, we can prove the system cannot exist with this question: Is there a way to prevent

For any given P2P system which can be used to share a large amount of files, we can prove the system cannot exist with this question: Is there a way to prevent classified documents of the US stolen by China, or child pornography from being shared using the system? If the answer is yes: I'm afraid to tell you that the system is not peer-to-peer in the sense that there is a central authority to censor what content is to be shared. Therefore projects like youtube-dl can be easily erased. If the answer is no: Such a system with no possibility of censorship is too dangerous. What if there is literally no way to prevent information that threatens the security of the US from being shared? Fortunately as of now, no such a system exists on the planet. Maybe you now have a vague idea why such a system does not exist.