From Habr:
Even a terrible paranoid can be called by a companion with an Android — and Google has a paranoid phone. Then a paranoid car runs past the house — and Google has a photo of the paranoid house, the name of his wireless grid, and (of course by a tragic mistake) a little traffic from his grid. Then good friends will tag on photos of the paranoid, and Google will find his face. Well, thanks to the hard-working bees, building their social connections in each laundry, Google will have an approximation of paranoid locations.
Moral: It is hard for paranoids today :)