Seeker 4,
You seem like a leader, someone who tends to get involved with what concerns you. You are obviously intelligent and very articulate too. Having all these qualities, I can see why it would be hard for you to not get involved.
On the other hand, I think a large amount of the ones who leave were fringe witnesses. They liked the promise of paradise, but never did much to get involved. A lot more had the religion forced on them as children. These people, unfortunately, often still believe in at least some of what the jws teach, so don't care to actively oppose them. I have always thought a walk away believer is in the saddest position of all.
Many on here are trying to keep their family relationships intact to a point, so don't go any further than here. Maybe I am wrong, but I see a slow fading in the congregations around me and a weariness of many of those still in. This is what drives most of the recent decisions from the society.
I appreciate what those who came before me have done to pave the way. Sometimes I think leaving them guessing is also an effective way to make them think about things. If they are not able to pigeon hole you into a neat little classification, it rather disturbs them. I see a lot of witnesses around town and exchange greetings with them. I can always see the burning question in their eyes about why I left, but they don't ask and I don't tell. If someone came to me and truly wanted to know about what I've learned, I would be glad to talk with them.