I agree with your O.P Nico, we can see it happening now, the Internet is such a wonderful aid to fiding even the most obscure information.
I believe too that as the 3rd world countries and the poorer immigrants to richer nations get connected to the Net we shall see a large exodus of these good people.
They often get sucked in because family members already are in, and they will leave as families too. These people are often very concerned with moral values, and on the surface they find that the WT/JW religion seems to be a moral one, but once they discover the underlying foundation of lies they will not want to stay.