Slightly off-topic, but the topic of the story made me think about GPS navigation devices. Not a big deal, but slightly annoying.
For Tesla, see http://news.ycombinator.com/item?id=3619088
I find it odd that people are so concerned about this while they carry a tracking device with their person all or most of the time...
EDIT: not only that, can be instructed as a real time listening device, if you are that paranoid :)
I'm not disputing the use case of tracking via cell phone but that's a whole other ball of wax.