That reminds me of an article I read on biztravel.com about how Coke has no problem if you buy a 2 liter bottle for $.99 cents from a gas station when they are selling the 20 oz size for $1.19, only drink about 20 oz, and throw away the rest. Only the airline industry.
When I am stuck in coach I have fun explaining the ridiculous rules to other passengers. What awe I see