It think your last point is quite valid, Guest.
Look around this forum. I'd say on whole, the people who were DF'd, Removed etc, are the strong willed ones. We've all been described by the elders as "spiritually stagnant, strong willed, unwilling to follow (my favorite word) guidance". I bet money that if we could compare all our cards the elders kept on us, we'd see a trend.
I've often thought about the real truth behind disfellowshipping. It has TORN my family to shreds. Some people follow the rules more diligently then others, in my family. My grandparents have been unable to completely toss aside their daughter (my mom), while her own sisters act with selfless love for the Jehovah, and shun her. If they were to see the error of their ways now, think of how destroyed the past 15 years would be for them.
It is like a lot of us here, following the way whole heartedly, only to be forced to see the falsities we were living for so long. Remember how painful that truth was/is? Disfellowshipping remains because to deny the validity of it now underminds a major stone in the WTBTS foundation.
~Snapdragon
And yes, communism is a great analogy. I'd never thought of it that way. The only difference being that communists could force an entire nation to become part of the collective. But Witnesses practice in a freedom-of-religious-choice country; so you join by free will, but you end up getting stuck, by free will, too.