*** Thursday update No. 3: Nevermind.
The enigmatic Skulllphone took street art vandalism to a new level of sophistication last week, apparently hacking into 10 Clear Channel digital billboards across metropolitan Los Angeles and covering the advertisements with his signature image, the dead cellular user. Supertouch has pictures. Brazen, illegal, and, if true, impressive. But some commenters at LA TACO are arguing the "operation" was just regular old bought propoganda.
* Thursday update No. 1: I sent a press inquiry to the people at Clear Channel asking for verification of the hacking and any sort of comment. Updates as warranted.