Drones

Quadcopter drones are used to control mortar fire
http://www.youtube.com/watch?v=X8DPaoRtwh0

Is there any defense against that? I.e. you can't take drone with AK-47 and a rocket would be too expensive for a 200 bucks Chinese toy. Is now the time for fighter drones, taking one another?

>>6

It is too high, too small, and moving. Some camouflaging is also possible: try picking a blue drone below blue sky. I'm sure modern material can be used to make it bulletproof with little additional weight.