It's just a matter of time before we read about a drone bringing down an airliner.
Why limit the discussion to drones? e.g. What about model rockets?
What about rifles, of which there are millions in the USA (not so many in Europe, not sure about Russia)?
How many airliners come in with a few bullet holes, or even neat rows of bullet holes? None I've heard of. Imagining problems isn't helping.
You can try banning drones, but it wouldn't work. But you have no chance of banning (in USA) those weapons that could do far more damage and are readily available to people with terror in mind. Americans seem happy to live with that risk.
If it is the nutjobs, who think it's fun to buzz an airliner, you want to contain, why not try some education?