"When a smartphone user opens Angry Birds, the popular game application, and starts slinging birds at chortling green pigs, spies could be lurking in the background to snatch data revealing the player’s location, age, sex and other personal information, according to secret British intelligence documents.
...agencies have traded recipes for grabbing location and planning data when a target uses Google Maps, and for vacuuming up address books, buddy lists, telephone logs and the geographic data embedded in photographs when someone sends a post to the mobile versions of Facebook, Flickr, LinkedIn, Twitter and other Internet services."