I can think of some other examples of gluttony besides that. Intentional and unnecessary abuse of an animal, such as the practice of shark finning. Denying appropriate nutrition to those dependent on you in order to afford or more easily obtain preferred food (or substances) for yourself. Intentional destruction of the environment (or someone else’s environment) in order to obtain food. (THis one is pretty rare in our society, since most of us are so far removed from the process of food production, but it COULD happen.) Another would be stealing food. (Very common in offices.)