Here's an interesting tool for photographic graffiti. Julius von Bismarck's device detects the flash of another camera and illuminates text onto anything, meanwhile, the photographer has no idea how the text appeared in their photo. Check out the video.
http://youtube.com/watch?v=EAX_3Bgel7M
“
I saw that yesterday too. Pretty cool idea that could be fun, but talk about pretentious!
”