The only way to stop it being spent on cigarettes or alcohol is to make it ineligible in any store where such items are sold. Otherwise there's gonna be lots of stress on the cashiers in 7/11 etc.
Weight is critical in determining take off speed and there are published figures that airlines follow/adhere to comply with regulatory body safety standards.
Yet have just spent 2 hours with the kids (flu symptoms) at a clinic. where every man and his dog were coughing and spluttering. but 50% were not masked.
Probably put them on when they go to Lotus's later mind !