Those sound like captchas for drones to me. We've already started to see that bots can defeat some of those better than humans can. Decoys are likely the best

Those sound like captchas for drones to me. We've already started to see that bots can defeat some of those better than humans can. Decoys are likely the best answer, but not necessarily practical for offensive operations. And given the low cost of drones, likely limited in usefulness anyway.