I wish they'd make a policy like this for flying. I can deal with screaming kids in restaurants as it's not generally that quiet an environment anyway, but when I'm on a plane there is nothing worse than sitting next to young kids.
I ask to be moved right away and in 98% of the cases I AM moved. I'm 1000% behind a kid-free seating section on any plane and would happily pay premium dollar in order to get away from them.