> Or, maybe, don’t: when people do, they take much more than they eat. Compared with ordering from the menu, all-you-can-eat breakfasts waste more food—up to twice as much, according to one study.

Is that a cultural thing? We have pretty much zero food waste on any buffet as you can easily only take what you actually want to eat. It's just basic good education to be considerate with resources, especially food resources - and I rarely see people taking more than they actually eat, so it's not just an "our family" thing. If you do throw away a lot of foot on a buffet you're just an inconsiderate asshole - and if a restaurant location has significant food waste from that they should just start charging for leftovers.