The Threat; The Many Ways to Kill a Drone; State of the Industry
Little mosquito drones; Screens and mosquito netting would be effective against the tiny drone until you open the door. Live in windy places....Live in big places far away from roads. Any battery that powered those mosquito drones would have limited range. I do not think those are places these would be deployed. It would probably be in a setting where the operator would be hidden and still direct the drone, someplace like a stage or ballroom or auditorium.
**It existed first in science fiction:
Dune- The Hunter seeker..."You have a traitor in your midst"
QV. Sky Net in Terminator; Squiddy in the Matrix.....
Interesting comments on drones. ThankQ.