Andrew Sempere considers the invisible trail of censorship that can occur on the Web:
Like the bubbling on celebrity photographs [above], technology can be manipulated to imply something is there when it isn’t, but unlike the censorship of the 1950s, there is no drawer of discarded YouTube videos whose content has been deemed inadmissible by copyright violation. … There is no recourse for accessing the Flickr Pro accounts of individuals who have died. There is no system in place for archiving the Facebook walls of the missing. This type of removal is ruthlessly efficient and effectively invisible, garbage-collected by automatic censors, not available in any form. The non-presence is invisible, and the story of our cultural transitions are potentially lost if we’re not careful.
The Dish 