Its already listed on Wikipedia
http://en.wikipedia.org/wiki/Aqua_Teen_Hunger_Force
Images of ATHF Characters Ignignokt and Err were found on "suspicious devices" in and around Metro Boston. The "devices" were a "keyboard-like device" found wrapped in black tape or duct tape and when "turned on" an "electronic screen" would show a character (either Err or Ignignokt) flipping the viewer of that screen off.
Turner Broadcasting System has issued a statement saying "The 'packages' in question are magnetic lights that pose no danger. They are part of an outdoor marketing campaign in 10 cities in support of Adult Swim's animated television show Aqua Teen Hunger Force"