The idea of "exposing" the GB is a bit ambiguous imo.
I feel that because the Watchtower is an institution (i.e. social mechanism), the rules of institutions must apply. For instance, once the groundrules have been established for how the institution should function (something I would argue occured long ago inside the Watchtower), a more darwinin system of development is likely to take over.
Some people in the org have certain spheres of influence, but all are limited. Each person is forced to follow his own self interest, usually through personal dedication to the groundrules. Dedication to the rules becomes the test by which loyalty can be measured. Everybody tests one another.
Because of this, I tend to believe that individuals with positions of power within the organization probably are far more negligent than they are purposefully deceitful. They work in their own interest, but also in the interest of what they feel is just and right (e.g. the groundrules). They are likely to ignore problems, or create elaborate reasons for why no problems exsist.
I agree with others who say that active engagement against the organization serves little purpose. Ex-jw communities, like this one, are helpful for people who have already made the choice to leave. The net has given people the chance to find this info eaiser.
I tend to think that the real problem doesn't rest with ex-jws per se, but with academia. Because the JW's do not actively engage the academic world, articles and books which place the witnesses within theorhetical concepts (e.g. communication theory, comparative religious studies, etc.) is lacking. Good history books on the org are hard to come by. I think analyzing the organization from this perspecitive could be very insightful, but it takes work! As of yet, there is little interest in anybody out there developing some kind journal or organization that really studies the organization as a religious phenomena. Most of the work has been done by ex-jws, which has both positive and negative aspects.