While I'm not a believer the 'fat gene' theory, after having someone I know literally eating themselves to death, I'm more inclined to view people who are super-super obese (yes that is a medical term) as people who have a mental disorder, and as such should outside of the judicial process.
However, if the Governing Body produced articles will a little more research and depth, they could correctly explain the sin of gluttony through the roman practice of purging while feasting. As the wealthy would vomit a full stomach (sometimes not even privately) to continue eating. From this, it is easy to understand that a Christian practicing shear wantonness, would affront 'the God who gives all things' and those in the congregation who had too little.