> In your opinion, how would Facebook know your location if you never logged in from a GPS-enabled smart phone? (and never approved an HTML5 geo permission requ

> In your opinion, how would Facebook know your location if you never logged in from a GPS-enabled smart phone? (and never approved an HTML5 geo permission request on your laptop). No real trick to that; if the user signs in from an IP leased to a Christchurch, NZ ISP on March 5th, 2007, then it's a safe bet that any photos taken that day were taken near Christchurch (and you get date taken from the EXIF data of virtually every camera on the planet).