The human race now creates, distributes and stores more information than at any other time in history. Frictionless and cheap digital networks circulate information in ways which either authors or subjects are unable to trace or control. Servers store data which can be found on the world wide web years after it has ceased to be accurate or relevant to its original use. These developments have given rise to a movement promoting a 'right to be forgotten': an argument that freedom of expression should be balanced by a right to erase information which affects an individual, under certain...