As soon as this contains some illegal content - child pornography, violent/obscene content law enforcement will start going after anyone hosting a mirror and the ISPs/Hosting providers they are using, the whole thing will crumble like Napster.
In the US it’s illegal to provide communications equipment or service to terrorists
Sure, support decentralized chat services where terrorists are moving to avoid Twitter
Enjoy having the FBI come to your door if they find out you have nodes on those networks
Trusting people you don’t verify is never a good idea. Building a protocol that verifies computers but not the user of the computer is insane
Oh yes, nice math you got there. But who is really on the other end?