You cannot remove somebody from a cult unless they want to leave on some level. It's the same with alcohol and drug addiction. The main motivation has to come from the addicted person. Otherwise, it's a waste of time.
I agree that the elderly who have spent a lifetime IN and have no family and no place to go should be left alone in their fantasy world.
My sentiments as well. All my parents know, at 70+ years, is being a JW. Their entire world revolves around it, right down to their social and support network.
While many here have told horror stories about how elderly JW relatives were ignored by the congregation, I have to admit that my parents have been treated well and are looked after by their friends in the hall. They are part of a group that does look after its own.
For me to try to "free" them from that would probably devastate them for their few remaining years. At this point, it's best to just let them finish life off with their beliefs in place...and their sense of friendship intact. They're happy there...why make them unhappy by trying to prove them wrong?