You miss the point, me thinks
Right now a burglar needs to watch your house and see you leave.
With this he can watch a post code or three from the comfort of his already stolen armchair. And with google streetview, he can even take a good look at the layout of the land prior to a jaunt into your particulars.
Burgling without any of the groundwork it used to have. Genius.
Then again, most of the sad ******* who use facebook have little life and can be found frequenting chav bars and their own bedrooms. So it isn't really a great boon to the 500 million who can't keep friends without the medium of a website.
Either way for zuckerberg and his cronies, this will just give him spacial awareness of his target audience and those '$$$' of advertising and sold data will be targeted all the more lucrative.