Joseph - All of that doesn't really matter. JWs disfellowship the average rank and file for joining the local YMCA, but yet the WTBTS goes and joins up as an NGO - a Satan-run organization. If you showed the average rank and file JW a copy of the NGO brochure and asked them if these members are a part of Satan's worldly organization, I assure you, they'd say yes. Then ask them if they can join an organization of Satan's to further the work. They'll tell you 'no!'. That's because the Watchtower tells them that members of Satan's worldy organization will be destroyed.
JWs aren't allowed to participate in the military, because they'd be supporting Satan's world (as someone above said). Some JWs sit in jail (some have been killed as someone said above) because of it. How is that furthering their work? Wouldn't it be better if they just allowed these JWs to do their military time so that they can then further the work? Wouldn't the word be spread more if these JWs were out of jail or alive? Why do they forbid these JWs from participating in Satan's world to further the work, but allow their corporate dudes to sign right up? It's so completely hypocritical and think of the lives that are messed up because they aren't allowed to join a Satan run organization.
Of all organizations that the Watchtower could have joined to further the work - they picked the most controversial one. They know it and that's why they kept it from their members. If I was still a JW and someone showed me proof that the Watchtower was an NGO, along with the NGO brochure, I don't think I'd even believe it, because to believe it - it would mean that my whole world would come crashing down.
If you have never been a JW - I can understand how lightly you view this. But as a former JW, I can tell you that this is a big deal.