At what point does gluttony start?

[Anthem]

To me gluttony could have several manifestations, just like the other deadly sins.  Here are some things I think fall into the category of gluttony:

1.  Eating substantially more than your caloric needs on a regular basis; eating yourself sick.
2.  Eating when one is not hungry.
3.  Binging and purging
4.  Habitually eating expensive or luxurious items or eschewing common or normal food in favor of expensive food.
5.  Wasting or throwing away food.