If some hovers a drone over my pool is it ok if I blow it out of the sky?
Depends on how high above your pool it hovers. Zoning laws will tell you how high you can build on a given piece of land, and that is effectively your "air space". A government drone would need a warrant to enter your airspace, and a private drone would be trespassing. You could in essence shoot it (assuming the bullet doesn't leave your property :-)).
These types of situations are real. Planes flying over people's property and invasion of privacy are legitimate concerns. As the number of drones and such rise so will these problems.
When the government starts to intervene the numbers will be limited, don't care if it's military or recreational - both will be impacted.
The FAA is already grinding at the general RC community over this issue. The 400 foot rule and such near controlled airspace is prime example.
Military Drones sharing airspace with civilian airliners makes me nervous. It should make you nervous...
I repeat this is not a billion dollar business!!! INTC has no business in this area. INTC didn't miss a thing.