curiousconfused - Welcome to the board. Look forward to your contributions.
I do understand what you're refering to when you talk about the psudo-association that comes from constantly discussing things JW when you've left. As I'm sure you know, there are those that are JW only to keep up family ties and appearances. Even some that are serving in some appointed capacity that either don't believe at all or have serious doctrinal/organizational issues. So, those folks (I'm including myself as one who attends for family reasons but doesn't think the WTS is Gods chosen organization) will critique the literature here since they're not able to do so with loved ones or others in their congregation. Or at least that's my motivation and I'm assuming others feel the same way.
As for those that have either faded or have da'ed or been df'ed, I think the shunning practice is probably why they can't just let it go. I think there are a large number of exJws that don't come to these boards or don't necessarily focus on the literature. They're done and that's that. But, the pain caused by shunning is so great that some feel the need to help others see the same way they do and leave. Honestly, communities that practice shunning (mormons and scientology are 2 examples) tend to have more vocal ex members as opposed to say Baptists.
Anyway, I think your prospective is valuable and hope that you'll stay.