Well I am not sure if this is a pet peeve or just sad, but I always see some people load their tray full of food and leave half of it. Some of it hasn't even be touched. I find that rather sad. I just hate to waste food and see food wasted. Must be my childhood upbringing, I heard it every night at the dinner table. They were always starving in Europe according to my dear sweet parents. Plus it just makes our fares go up ! I know I can go back and get more if I really want to.