My two cents.
I am a theist.
This forum has a number of Christians, open to debunk WT, and obtain converts.
The majority here are extremely respectful, AFA internet behaviour goes.
I do believe that WT philosophy benefits a small proportion of their membership. However, other high-control religions (Mormons, Scientology, Moonies, many Islam, extreme Christian), or groups (AA, etc.) would provide the same structure and discipline that substance abusers, etc. have been lacking in their lives.
Does this allow WT to exploit this structural control to manipulate the lives of these ones, and, more importantly, to effectively destroy the relationships of their members' friends and family?
No sane person would come to the conclusion that WT's alleged ends justifies the means.
As for feelings of those waking up:
To understand why we all feel so messed up, take a look here:
http://www.exitingthejwcult.com/p/if-you-are-going-to-see-mental-health.html
Bonnie's book is a MUST-READ for recovery.
http://www.amazon.com/EXiting-JW-Cult-Handbook-Witnesses/dp/1508477132