I'm sure we all view the Watchtower Society as a mind controlling dictatorship that has systematically destroyed our lives is some shape or form. I'm sure this is why we've all left, but have we really? Someone can physically leave a religion, but emotionally they're still there. They still believe. Whereas a person who no longer believes stays physically becauses he/she wishes for no one to learn of their secret demise. I would consider the one who is no long a believer as the person who has truly left and the former as very much still in. This is a black and white situation though. It's not always that simple. Let me explain:
There are Jehovah's Witnesses who can't imagine leaving the faith and living their life as is. Some go to great lengths in order to find another religion or another way of understanding the bible before offically leaving. It's like a person who is in a relationship, but afraid to be alone. So they go out to find another person to be with before deciding to leave their spouse or significant other.