[m0zg]

The first time I tried to fly a drone I broke all four of its rotors and _scratched the glass_ on my patio door. A bird would almost certainly be severely hurt by the rotors. You can't seriously make the argument in favor of using birds. In fact, if there is an argument to be made here it's in favor of the drone immediately powering down the rotors if it notices a bird approaching.

[catalogia]

It seems plausible to me that a bird of prey could learn how to attack drones from safe angles; I don't think a bird would necessarily be hurt by the drone, but I concede that it's a highly possible outcome.

Restricting the use of anti-drone birds to scenarios where human lives are on the line seems like a reasonable compromise, and I do seriously make this argument. I'd further consider it reasonable to hold the drone pilot legally accountable for any harm to the bird.