Regardless of technical viability, any service without moderation is a service mainstream society will shun, which really just means people won't use it, build tools for it, or generally accept others who use the service.
People seem to both want a service that is immune from society and also used by society. That's a conflict that won't resolve.
People seem to both want a service that is immune from society and also used by society. That's a conflict that won't resolve.