I think the internet is a very valuable tool against cults, but to be useful a tool must be used. Many "good" people are unwilling to dirty their hands with discussions of the evils and failings of The Watchtower; they have the misconception that to be a good Christian gentleman they should not speak ill about any man. To me it seems they are forgetting that their Hero threw the money-changers out of temple with considerable violence.
So it is NOT ENOUGH to make your exit, walk away and live your life. As The WATCHTOWER itself once said, ""When persons are in great danger from a source that they do not suspect or are being misled by those they consider their friends, is it an unkindness to warn them? They may prefer not to believe the warning. They may even resent it. But does that free one from the moral responsibility to give that warning?" - THE WATCHTOWER January 15,1974
I'm not suggesting that someone is obligated to be on JWN 24/7 posting 12,000 comments a year (not that there's anything wrong with that), but a person should at least tell their story and tell what they personally know about the organization and the people who run it. One that has been done, any "duty" is fulfilled.
As long as good people do nothing, evil will persist. This is one of the great lessons of history.