Imagine a moustache being drawn onto the face of Da Vinci’s Mona Lisa, or a hole being punched into Salvador Dali’s $24 million portrait of Paul Eluard. If you are not a photographer, you may not feel the same about a piece of negative as we do, but trust me, when it was shot by legends such as Walker Evan’s and Dorothea Lange only to be vandalised by some bureaucrat, I personally turn into the Hulk.