Well, aside from the momentary panic flaring up among New Yorkers who experienced the September 11 attacks, there's the wee issue of the tons of pollution spewing from the planes, according to The Washington Post. Each plane would emit about 400 gallons of fuel, each with roughly 800 grams of lead, and tons of pollutants.

Still, ABC said the stunt was aimed at being "carbon neutral." However the network had aimed to achieve that, though, the idea of sputtering greenhouse cases over major U.S. cities is a tad embarrassing for a company that said this year it plans to halve carbon emissions from fuels by 2012. The stunt would have targeted cities from Boston to Las Vegas that are already dealing with enough carbon-emissions before all those extra unwanted additives were put in the air.

ABC said it had made the decision to use its advertising resources for "other marketing tactics." (A representive declined to clarify.) Maybe the next marketing plan for V -- about seemingly benign aliens plotting to take over the planet -- will include a more environmentally friendly option.