In my experience, the people in the congregation that are disfellowshipped are actually some of the nicest people there. They feel guilt about their wrongdoing and either confess outright or do not deny it when the wrongdoing is presented to them.
In other words, they're normal LOL. It's so true. Those that have trouble with meeting attendance, or low field service time, or anything for that matter that The Society looks down upon, those people tend to be the people in the congregation who are the least backstabbing, least gossiping, and most genuine in your average congregation.