Nope.
Disfellowshippig, shunning, and a cultivated fear of the outside world keeps them in it. In the deep recesses of their minds, lots of Witnesses know that there's something wrong (several have admitted this to me)...but they stick with JW-ism because the risk is too great. They don't want to lose their families, friends, (for some) business relationships, etc. In other words, staying in the Watchtower is the course of least resistance.
And for some of these folks, I think staying in the Watchtower is a rational decision--if they can mentally handle the cognitive dissonance. If you wonder who these people are, look around your congregation. Think about the born-in brothers who are not "reaching out." The brothers and sisters who buy new houses, accept promotions, pursue higher education for themselves and/or their children. Also, think about the married sisters who work full-time even though they could get by without the money.
Some of these people are sticking with the Watchtower because it's the course of least resistance. Think about it. If they really believed that these are critical times, and the end is right around the corner, would they be going to college? Would they be working full-time? NO, they would be engaging in the full-time ministry! The fact that so many JWs are content to live a "normal" life (2 meetings a week plus Saturday a.m. door-knocking) shows a latent skepticism toward the counsel of the FDS.
But they stick with it...because leaving is not worth the trouble.