Bending ute chassis has been around since the ute I guess. Who can remember the one tonners, they would bend. And my dad worked in a truck repairers in the 50s and most of his work was making "fish plates" to stregthen the sides of bent chassis once they straighten them out. It's as @cruza driver said people have no idea about loading and balance. I would happliy have a tray back and fit airbags to it but by geez I'd have some pretty strong plates attached to the chassis in key points!