Not hard to beat
It would be pretty easy to detect an incoming drone and connect that to - automated - turret mounted water cannon. Enough to nobble a drone and not hurt someone.
Sadly by the time this was developed and implemented by the usual channels it would cost $50m a pop, despite the fact that it could be done for say ... *waves hands* ... 10 turrets (and plumbing + compressors etc) plus 10 sensors and integration of said, plus RnD, say 10 x 5000 + 10 x 2000 + 100000 + 100000 = £270,000 = say USD 400,000. Now that's value for money ....
... or you could just look for who picks up the thing dropped from the flying thing that just flew over and beat the crap out of them until they remove it from their ....