Drone combat seems like an unnecessary step. I think you'd just float some blimps with various sensors to watch for anything suspicious. [1] If you did spot a

Drone combat seems like an unnecessary step. I think you'd just float some blimps with various sensors to watch for anything suspicious. [1] If you did spot anything suspicious, you'd simply move your high-value target as if you'd spotted someone with a gun or a suspicious bag in the area. A jammer could be put into a ground-based vehicle and activated as part of a response, but even if you could engage a suspicious drone with your own, you'd still need to move the would-be target for safety's sake. So why bother? [1] I'm rather surprised these things aren't already in use. They could be trivially disguised as promotional material for an event and even be tethered to provide superior power/data resources to your spotter blimp.