[mirimir]

I totally agree, but want to emphasize one thing.

Let's say that stuff was encrypted during transmission, and also when stored by peers. But peers could see each other's true IPs. That would basically give you a modern version of Freenet. And just like with Freenet, users could be arrested, and prosecuted based on hand waving. When you get down to it at trial, "plausible deniability" depends on having a suitable expert witness, and convincing a jury that the prosecution's expert witness is full of it.

So anyway, none of that helps unless true IPs of peers are hidden.