Feels like the end-game is that anti-drone defense turrets are just going to shoot down anything that looks like a bird as well.
I worry that it’s easier to build an automated turret that shoots anybody, than it is to build a turret that shoots only enemies.
Probably, but only due to sheer laziness. It should be easy to distinguish electronics from birds at sufficiently close range. Plus I'm certain the physical behavior doesn't hold up to close scrutiny.