Totalitarian nano-control

At Is CRN Playing Politics there is an old discussion of how nano should be controlled. The CRN position (at least at that stage) was that centralised control is the preferred option. The discussion shows pretty quickly that centralised control over nano in practice would mean totalitarian control over pretty much all modern technology and all computers. It is obvious that any government that got that sort of power would never relinquish it. And with nano nobody would ever be able to take it from them. Sad. Need to think better policies...