in some sense it isn't nightnmare, it is already a reality, just non-uniformly distributed. Sounds like you just haven't watched hours of footage from Ukraine. The drones there - in the 10-30km zone from the frontline - are onmnipresent like birds, just the birds of the killing-humans-on-sight kind (and with IR cameras it is 24x7, at night it is even more effective as you don't see it coming, only hear a slight buzz of the props, while the drone sees a warm human even better at night, like a kind of a flying rattlesnake :).

Unprepared NK soldiers in Ukraine facing drones first time https://youtu.be/9BQKfSHqRDk?t=117