"Send in the drones!" Why not fight drones with drones?
I feel like a way better attack vector would be a computer controlled kite. Between a string reaching all the way to the ground almost invisible to see, and a bunch of long streaming tails from the kite to foul rotors - you could do pretty well, if you can find the drone.
I would think though it would be more effective to hire goons to hang around anywhere open and with a line of sight to the area over the filming. Kind of a different take on the XKCD $5 wrench encryption cracking strategy.