I don't feel the current crop of JWs would become "strengthened" by the inconvenience of a ban I think they would find it exciting for a little while but I also think for the majority it would get old fast and they would start to lose interest in the mini-dramas of the WT and just get on with their lives.
The majority of JWs are not die-hards anymore they have a very tenuous grasp on their religions policies, doctrines and meaning. Most would fold under the slightest persistent pressure.