Scrawling images and words on private property is a popular pastime dating back centuries. In the well-preserved ruins of Pompeii you can find bawdy remarks, boasts, jokes, and much more etched on the walls of the bars, barracks, and houses immortalized in the ash.Even those paleolithic cave paintings in Spain and France weren't undertaken with anyone's permission. Over the years, the methods used in this long and noble tradition have evolved with the technological developments of the day.Just as the primitive paint brushes used to create those beautiful cave paintings evolved into spray cans, stencils, posters, and stickers, so too has the humble spray can been updated with lasers, projections, LEDs, augmented reality, 3D modeling, and even crazy eye-tracking writing implements. And now, with graffiti inhabiting virtual space as well as the physical space, the Kinect emerges as the newest graffiti-making implement.Image viaCreative Applications