Impossible for a public thing though, noblogs.org will always be traceable to where noblogs.org is hosted because that's how the packets get there.
You can maintain much better opsec in a two way communication than a broadcast.
Right, I'm only moved to comment by the implications being drawn on this thread that Signal and WhatsApp are next. Different fact patterns and different legal standards.
Well, a fast broadcast at least. Of you're willing to wait for a pocket switched network to spread the signal, you can hide the source pretty well.