In my opinion, what's missing here is a view of the wider picture! If everything stayed as it was now, or even as it was a couple of years ago - then perhaps there would be little value in a Drone registration scheme in any country. However, things are not staying the same ... In the next couple of years, we'll see a lot more use of UAV's as 'autonomous' delivery vehicles for food, medicine, mechanical parts - you name it. We are even seeing growth in people-carrying aircraft based on UAV tech'. Aviation authorities know that they have to mesh that lot in with; Civil Aviation, General aviation, Military aviation - and with recreational & commercial UAV use. An operator registration scheme is the ONLY way that we - as commercial & recreational UAV users - have to show our numbers so that we are considered a responsible and operational part of this whole airspace usage.
The crazy irony here is that refusing to register, will put us in a situation where we (rec' & comm' UAV operators), may appear to be a lot less of a population than we actually are - and therefore, the regulations being put into place will either treat us as an insignificant group to be regulated out of existence or given no say in how we operate. Or worse - we could be treated as a 'militant' entity that doesn't deserve any respect or consideration due to the [NATS] Careless, Clueless & Criminal way we operate our drones.