I have seen some articles on this and well.... if PETA must fly those things then they need to be prepared for accidents.
Personally I would consider a drone like that over my property a hostile act specially after what I have seen in the news about drones.
I like this part of the article best, it really gave me a chuckle :
"Sounds to me like this will create a whole new shooting sport," the site said. "PETA Drone Target Shooting."
May also add another event to sporting clay shooting.