Here in the last four or five years or so, the Watchtower has been viciously attacking internet porn, chat rooms, and social websites like they are the Devil.
I think what is happening is this:
The WBTS can't come out and demonize the internet as a whole because it is far too practical and most of the West needs the internet to function. It is a fact of life. It exists. But they can attack parts of it. Chat rooms. Internet dating. Pornography. They can convice people that the computer needs to be in the main room so that people in the household are not tempted to get involved in such things.
But I think the real reason is that they don't want people accessing sites like this, freeminds.org, or countless other websites devoted to exposing the WBTS. Further, there is youtube and google video which can stream right into your home.
They can't come out and say that these websites exist and that they should be avoided because that would only encourage people to visit them, especially those who don't realize that this information is even out there or perhaps they never even thought to look. If they can convince people that the computers need to be in a common area, members are less likely to visit "apostate" websites or view other "apostate" authored material.
Witnesses are not stupid people, just brain dead. Once they could see much of this information, their minds would be activated again and, I think, many people would be free. There would be some psychological damage from breaking links with the Watchtower but this would still create a problem for the WBTS.
Aside: here is an interesting video that I found just today: What JW's are trying to hide from you
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