I was mainly speaking to the anti-aircraft weapon's addition shrapnel, rather than the drone itself. It's pretty hard to shoot down a drone without, ah, having the drone fall down. You can try some sort of hack, or radio blackout, but those are pretty easy to defeat.

But most modern AA weapons have tremendous velocities and are often explosive. Even after losses due to air resistance, AA shrapnel can come with with lethal velocities. I was told by somebody I trust that the Baghdad suffered more damage in financial terms from AA fallout than the actual US air strikes in the first US/Iraq war.