"Proper" airlines generally aren't very picky about the weight of your luggage, so it probably wouldn't apply to them, only to airlines like Ryanair that are.

"Proper" airlines generally aren't very picky about the weight of your luggage, so it probably wouldn't apply to them, only to airlines like Ryanair that are. I don't think it's a good solution, but I can relate to to bitterness of being charged for a 2 kg overweight and then getting stuck in half a seat because the person next to you is the size of a cow.