Jaap de Maat, a graduate student at the Royal College of Art, rigged a filing cabinet to follow people around for his final project. It reminds people of the data traces we leave behind. It's called I know what you did last summer.
It is physically impossible for the human brain to remember every event from our past in full detail. The default setting is to forget and our memories are constructed based on our current values. In the digital age it has become easier to look back with great accuracy. But this development contains hidden dangers, as those stored recollections can easily be misinterpreted and manipulated. That sobering thought should rule our online behaviour, because the traces we leave behind now will follow us around for ever.