Facebook has some 1.1 billion active users. Some 200 million accounts are active at Twitter. Millions more shop at Amazon and other online retailers. But few have actually read the long passages of legalese before clicking "I agree" and typing in an address, e-mail, telephone number or credit card details.

Me and My Shadow, a project run by the Tactical Technology Collective, keeps track of exactly what information people leave behind when they sign up for online services, surf the Internet, shop online and send text messages on mobile phones. The project won Deutsche Welle's 2013 The Bobs award for the best in online activism in the Most Creative and Original category