Yes, a person can be disfellowshipped for gluttony.
However, as in my congregation, there are many large sisters who have never been spoken to about their eating problems. I don't think anyone would dare, especially as most of them are married to appointed men.
Interesting how a recent watchtower article accused "heavy petting courting couples" as being gready!
The next time I eat my wifes face in a moment of passion, I think I may have to pull away in case I get fat on her loveliness. Ooh la la.
For the reccord, there isn't really such a thing as a disfellowshipping act - if you are a persistant rebel - technically you can be disposed of. So if it's too much cake or you are swinging with the elders - beware.
Goodgits
Sorry... Goodgifts.