How about "Piper Cub and Drone Collide. Crash In School Yard Killing 20 Children".
I can only hope that UAV's are required to display the same anticollision lighting as certificated aircraft, carry Mode C Transponders, and give way to all other aircraft. I will suggest that there should be comprehensive training requirements for UAV "operators" so that they are certified as knowledgeable on all of the aircraft rules and operating practices that the rest of us are. But I think that the first collision is going to start another lawyer's gold rush....
As for certification of parts and designs, manned aircraft designs are regulated to "protect" the passengers who travel in them. That reasoning does not apply to UAV's. But! There is a reasoned argument that people and property on the ground must be protected from UAV's falling from the sky. So that line of argument suggests that some type of design approval that scrutinizes the control system and reliability makes sense.
And there is a reasoned argument that an unmanned aircraft has a greater need for liability insurance than a manned one.
Fly safe,
Wes
N78PS