From what I've read, once a homeowner enters his address, it takes a while for it to be incorporated into a firmware update and eventually downloaded to user's devices. So it stands to reason that it would also take a while to get an address removed from firmware updates. So, let's say I don't like drones AT ALL. I just don't like those damned things buzzing around all over the place at all. So I just enter the addresses of all of my neighbors
... hell, everyone within a mile of me, whatever. Now those poor fools can't fly their drones in their own yards ... and it'll take them months (?) to sort it out.
Seems like it has the potential to cause far more grief than it prevents.