Google and others already have mostly world-wide spy cameras, both still photos and some live action. The "radar devices" they mention have variable frequencies that allegedly can see thru trees in a forest, and up to 200 feet underground. For some security, a person would have to have a tunnel in the side of a hill, and they can still monitor the air quality coming out of the tunnel, as well as activities coming and going.
Deception becomes a way of life, in an escalating battle of 'watcher and watchee', with people needing to always appear to be doing something different than what they are doing, as a general principle, to minimize the nuisance of the surveillance.
http://www.guardian.co.uk/uk/2010/jan/23/cctv-sky-police-plan-dronesCCTV in the sky: police plan to use military-style spy drones
Arms manufacturer BAE Systems developing national strategy with consortium of government agencies
Saturday 23 January 2010
Drones could be used for civilian surveillance in the UK as early as 2012. Source: BAE
Police in the UK are planning to use unmanned spy drones, controversially deployed in Afghanistan, for the ¬"routine" monitoring of antisocial motorists, ¬protesters, agricultural thieves and fly-tippers, in a significant expansion of covert state surveillance.
The surveillance data is fed back to control rooms via monitoring equipment such as high-definition cameras, radar devices and infrared sensors.
...their intended use – which could span a range of police activity – and that officers have talked about selling the surveillance data to private companies.