Are they willing victims? In this day of information you cannot claim victimization when the information is clearly available to all. Fear, sometimes sheer laziness, loss of family, those are all other reasons for staying in but not victim. The word victim produces images of one who had no choice. A jw who truly loved God would be more interested in real truth no matter the cost. Some may start out that way but then become comfortable with their status or the quest for it to care about God and His truth. Even those who know about the false teachings, abuses, etc... and still choose to do nothing have made a decision, that is their decision. Lack of action in itself is a decision.
As for 'good works' here is a favorite quote of mine- True acts of Christianity reveals itself in quiet acts of mercy and goodness that no one sees or applauds---but God. (forgot to cite where orignal quote was from, sorry to the author. Maybe CS Lewis?)