During both world wars, there were regular mass panics, sightings of bombers etc in places where there were no enemy planes at all. But people swore they "saw" them. It's either entirely fabricated or genuine mass psychosis caused by constant exposure to media fearmongering.

Not exactly military heavyweights.

And that's why I bet these drones don't even exist and are purely used to incite panic among people and justify social cuts