As far as I know there is no requirement to announce your assigned or legacy owned prefixes to the world. You have the right to announce them. I don't think you can legally stop others from announcing your path to them. Once you publicly announce something, it's out there. Oh well, maybe I didn't get the original question. I thought the discussion was about a network's right to prevent others in the world from announcing/propagating a route to that network's prefixes. Seemed to be a legal question and the field analogy someone put forth seemed to apply well. I can't take credit for that as I simply tuned it and showed how it fit in a historical way. I think a lawyer would probably make this analogy in a court. Thank You Bob Evans CTO
Interesting demonstration of why retreat to analogies does not help in a discussion.
A question: If you stop announcing your routes, where will the world get them from?
-- sed quis custodiet ipsos custodes? (Juvenal)