In Germany they are currently debating rules on what data companies can keep and analyze, vs. what they must throw away. To make a point, Green Party politician Malte Spitz went to court to force Deutsche Telekom to share the data they had collected about him, just from his mobile phone. What is revealed, basically, is where he was essentially at every moment of the day. Spitz handed the information over to Zeit Online, who combined it with information he revealed himself via Twitter and his blog, to make a scarily detailed chronological map of his daily activities.
From Zeit Online:
Green party politician Malte Spitz sued to have German telecoms giant Deutsche Telekom hand over six months of his phone data that he then made available to ZEIT ONLINE. We combined this geolocation data with information relating to his life as a politician, such as Twitter feeds, blog entries and websites, all of which is all freely available on the internet.
By pushing the play button, you will set off on a trip through Malte Spitz’s life. The speed controller allows you to adjust how fast you travel, the pause button will let you stop at interesting points. In addition, a calendar at the bottom shows when he was in a particular location and can be used to jump to a specific time period. Each column corresponds to one day.
Check out the movements of Spitz for six months of his life here.