Yesterday the New York Police Department invited citizens to post photographs of themselves with police officers using the hashtag #myNYPD. Perhaps inevitably they were not inundated with photos of grinning kids slurping sodas on brownstone steps posing with their friendly neighbourhood cops but a whole torrent of images of police brutality. In answer to the NYPD’s initial tweet “Do you have a photo w/a member of the NYPD? Tweet us & tag it”, the Occupy Wall Street account tweeted a photo of protesters and cops fighting, with the caption “changing hearts and minds one baton at a time”. Many more similar uncosy images followed.