How to Hide from Killer Drones
economist.comContentless article, roughly children's school primer level.
TL;DR: Drones see shapes as patterns. Paint other patterns on shapes, the drones get confused. If you want to keep confusing drones as their programming learns to recognize better, your patterns have to get better.
That's it, that's the whole thing.
// No commentary on heat, lidar, 3D, EM signature, or other "vision" using different principles.