Or just adequate cover. Or a drone jammer (something which exists and is available to civilians). Or a strategy that doesn't leave your troops milling around in open trenches for weeks at a time. Or a reaper drone flying overhead that detects the signal from smaller civilian quadcopter which then jams the drone, locates it's origin, ID's the operators with thermal vision and lodges a hellfire missile up their ass.

Again, a competent modern military isn't going to be vulnerable to this type of tactic.