I was just reading something and remembered this post you made.
Someone said, till the docs leaked that the CIA could spy on people through their TVs (and other avenues), the 'rational' ones would write off any such claim as a nutjob conspiracy theory. But they're not saying much now eh?
And I would still consider it to be a nutjob conspiracy theory at this time. In many phones, its the A GPS which is more useful indoors than the actual GPS, and this has an accuracy of a 20-30 metres, which is nearly good enough for starters. GPS is battery draining as well and works poorly indoors.