Which is why American Airlines doesn't paint its planes. Carrying around the weight of the paint eats up (some) fuel. American took it a step further when the No Smoking rule took effect. Someone added up all the weight of the seat-arm ash trays and calculated how much fuel would be used by the entire fleet to carry around the ash trays. It was some seemingly insignificant amount, but added up fleet-wide over the course of a year. So they had the cabin crew yank and discard all the ashtrays.
Michael
...and then it all went for naught when Hillary Rodman Clinton lugged her voluminous hindquarters on board for just one flight.