You're right about the extra fuel, though I really don't know what an extra 100-200lbs would cost to transport.
The movie theater example seems similar to the airplane: as long as there's an empty seat then it seems like stealing isn't quite the right word. Freeloading might be more apt.
The movie theater example seems similar to the airplane: as long as there's an empty seat then it seems like stealing isn't quite the right word. Freeloading might be more apt.