What is the final defense? I suppose we create underground relay networks of radio networks within cities that allow for computers to connect directly to eachother, and from there we seed all our pirated content and discuss whatever the hell we'd like. Maybe we'd have to contend with low bandwidth when we connect outside our own city network, using larger wavelength radio to bounce off the ionosphere across the plane…
Yes, Mr. Market will pay you handsomely for helping someone anonymously stream a torture of kidnapped child.
No, as a society, we decided we don't want that to happen even though it is technically possible.
There are horrible people, and they are drawn as moths to any oblivious operator willing to close his eyes (sorry, wanted to say "use e2e encryption" of course).