I'd guess it simply won't be that big an issue. They'll know where they are all the time, and they'll file theft reports and get police involved. They could add video, too, if they felt the need. In the US, it doesn't seem like organised bands are going to risk criminally attacking autonomous devices to steal parts.

Honest Bob's Cheap Drone Parts, refurbished Amazon-spec drone motors and controllers from, er, our friends in Shenzen, honest. I've got the receipts here, officer...

I would love to shoot one of them, if they ever fly over my house. :)