Some prominant xJWs have promulgated this myth. Some have done so out of hatred for the Watchtower others because of love for the ones hurt by the Watchtower.
The "taking down of the Tower" will not happen.
Just as the Roman Catholic Church continues and all of her children continue, so will the Watchtower. It fills a need among the religiously disenfranchised and will continue to so for some time.
There is no "smoking gun" large enough to take down a religion which draws to itself the cast offs of other religions.
Reform, reform, reform. Reform from within is what will cause the Watchtower to become more humane, more Christlike.
IW