Dezeen reports, here.
Like I say: when drones do annoying things, they can be very annoying, but they are far too useful to ban.
Hey, maybe a drone could have a 3D printer attached to it, to 3D print in the sky!
As Andy said in his comment on this:
I think the answer is micro-controllers …
Yes, once you have clever computers piloting these things, rather than clumsy old humans, they can do almost anything.