One of the things that makes cheap drones possible is easily accessible, off-the-shelf, cheap and lightweight computer/GPS/wireless hardware. Losing GPS and having to use inertial guidance makes the problem a lot more expensive and complicated, and advanced AI is like manned missions to mars--always further off than it looks.
Ok, so you are specifically referring to GPS. I agree, GPS is important for cheap and easy navigation. I was presuming you were talking about a link to a base-station.
Of course, aren't all the GPS satellites already government satellites in the first place? Seems like they wouldn't need to jam the signal, they could just shut them down, or maybe GPS can be set to require authentication...
