Interesting question coming from a person who goes door to door and comes to exJW sites to try and "change the masses".
I'm here for a few reasons, all of which have already been given
1. For Intel: We tend to know more about the Watchtower than the rank and file JWs do. The news about Mark Sanderson being appointed to the GB was here an hour after it was announced at Bethel. The letters to the body of elders are usually posted here sometimes before all the body of elders have even seen them. We can see what the elders are learning outside of what JWs are allowed to know (i.e. the shepherd book). We also are privy to news that the WT would NEVER release (i.e. Candace Conti)
2. To vent: We are able to express ourselves in a way that was never allowed in the organization. If we had an issue with a teaching or the way things were handled, we were told to keep it to ourselves and "wait on Jehovah". We can tell our stories about who we were, what happened, and who we are now. This is therapeutic. The silence isn't healthy and getting it out to others who have seen the horrible things that go on inside the organization helps us to have some sort of closure.
3. To help others: We are able to be there for other questioning or newly leaving JWs and let them know that they are not crazy for feeling or thinking this way. There are others that have been through some of the same things and were able to find life outside of the Watchtower. One of the things that cults use is fear. Fear that there is only bad out there. Everything outside the WT is evil. If you were to leave, "Where would you go?" "No one knows the Bible like WE do". We can help others through sharing our stories.
I think one of the most telling things about questions like this is that Elephat is thinking that we still think like JWs. We are supposed to change everyone. I don't think like that anymore. Yes, I give my thoughts, opinions, and ideas here about God, the Bible, etc... But if someone doesn't accept it, that's fine. I don't mind. I have alot of friends outside this forum that are atheists, and we get along great. We know we are probably not going to change the others ideas, but we can be friends anyway and have lively conversations. As long as we talk with respect to each other, everkything is great.
So no, I don't want to change the masses. I don't think I (or anyone here) is going to bring down the Watchtower. Those thoughts of grandiosity are saved for current JWs that think that the UN is going to destroy all religions, but the WT will be the only one standing, and when they try to destroy them, God will step in and get angry. They also have the grandios idea that they will keep growing. I think that will eventually level off and with people able to do intelligent research about the people that keep coming to their door, the truth about the truth will grow.
I think the Watchtower will go on for a long time. As long as they pretend to know all the answers to everything and make people feel like there is nowhere else to go, they will be fine.