[superuser2]

Prisons will probably have to adopt some form of electronic countermeasures. Civilian GPS is easily spoofed, auto-targeting lasers could make onboard cameras useless, and radio jamming ought to be put in place regardless of drones to combat cell phones.

Governments are able to play the game of constantly one-upping electronic warfare systems, but you could make it too expensive for civilians to have any sort of control or visibility when flying a drone over your site.