If you watch some videos from Ukraine, you will see, that shotguns can hit them with much increased chances. So if possible without endangering civilians around the place where drones are sighted, I say get finally started, take the shotguns out and take out Russian resources. Just for the time of war make private drone flying without special permission and preflight registration illegal, then take down any drone that moves and is not registered to have a flight at the time. This also won't be giving away very critical military knowledge either.

One thing I don't know about shotguns is, how dangerous falling projectiles are. How much velocity they accumulate. That could be a real problem with this approach.