It is rather obvious that this addiction stems from ones association with the organization, because no matter where you were in the hierarchy of this system, your life revolved around this religion and its activities. It affected what you ate (no blood sausage), what you read (nothing but watchtower materials), whom you spent time with (JW's only), and your choice of careers (pioneering is the way to go). This inevitably instills a sense of need to the average JW. There life has no seperation with their religious affiliation. This often continues for many after they leave the organization, and many have difficulty simply moving on with their life. I believe that even in some sense the addiction/co-dependency intensifies because one has hate for the organization, and becomes very passionate about their dislikes for the society. This seems to fuel their addiction. IMHO, It is a sad way to live.
I just have to say, I thought those were excellent thoughts. I'd never thought of it from that angle, but that's spot on.