New Privacy Threat

Recently I was sent some photos of a fridge, tv and some furniture that was for sale second hand. It was passed onto me and I have never met the person, however after receiving the photos via email I could distinguish where the person lived. This was because the persons iPhone geo tagged the photo with a gps marker. It was spot on with the address as I ended up going there to help with picking something up.
What concerned me was the level of accuracy in which i could identify where the items where located. This could spell trouble for people using iPhones and other geo tagging phones and cameras to share photos. As there locations are free to view if the user is unaware the setting is switched on.