Sad, comical, or just tragicomical - Cingular ad windup

Cingular billboards in NY are a reference to the 9/11, apparently. Outrage!

An Outrage Grows in Brooklyn!!!/The Outrage Continues - Continuously!!! (Low Culture via Adland)

Thought the windup was mildly humorous (well, I'm pretty sure they're satirical) but watching people react to it is funny and sad at once.