I don't quite agree with those who say that JWs will/may grow stronger with this ban. I think today's world is different, information readly available. This ban has the potential to trigger the curiosity out of those trapped in, about what is really the reason for the ban.
When I was a JW I thought there was little opportunities for discussion about religious issues. This ban will surely cause discussions among JWs and, hopefully, put their critical/analytical thinking to work.
Observador