I think it would be more fitting if you just threw them out of the plane at 36,000 ft. It would lighten the load AND not waste a precious bullet. Everyone wins.

Seriously, putting ANY restrictions on the captain's final decision as to how much fuel should be taken is an extremely dangerous road to be going down. The flight crew should be able to add any amount they deem necessary to the preferred quantity that the company comes up with, no questions asked. But as usual, it's going to take 150 people perishing on a flight that ran out of gas and crashed 1/2 mile short of a runway because the flight crew was pressured to take less than they deemed safe before the public really start to get mad about the whole thing.