Legendary graffiti artist Banksy didn't quite break into MoMa, he just simply made it his canvas. Inconspicuously, or just thanks to an inept staff, the British stencil genius smuggled in his own art of a soup can and hung it up on a wall without a single suspicious eye for three days. This is the first planned target of four New York museums. Stuffy curators everywhere are on high(brow) alert.