Talking about your feelings and experiences is definitely good whether that is online with 'anonymous' support or face-to-face with friends.
I think the key thing is not to try to seek revenge. You need to let go of the negative anger and channel it into productive endeavours.
No one will ever bring the WTS down. A religion of a large enough size is pretty indestructible and the WTS may have some less than successful years but it has enough people and money to sustain itself regardless of whether it can be show to be right or wrong.
Trying to damage it only damages ourselves and further hurts our own lives. Don't fall for those who are very vocal about cheering people on to try and fight - they do not have your best interests at heart, they just want to use you as an expendable pawn in their revenge game.
The irony is that if you focus on trying to help others by being supportive and providing information then it's actually the one thing that is possibly most effective in inflicting some hurt toward the WTS. Making it easy for people to leave is the most threatening thing to them.