Hillary,
You asked: Would you try to inform them of the failings of their religion if you were given the opportunity?
I think you know my answer. Of course I would. Why? Because I have good news to share with them.
Sure, these people's lives may be somewhat better with JWs than they used to be without JWs. But I know they could be much better still as free Christians. I know how much better my life is since I shed the heavy yoke of Watchtower slavery and replaced it with the kindly yoke of Jesus Christ. I also know that even though the Watchtower yoke may be a bit lighter than the various yokes these people used to bear, it is still much heavier than the one Jesus Christ requires His followers to carry.
Because I know these things, I would feel compelled to tell these people that Christ died to set them free. Free not only from sin's condemnation to death, but also free from bondage to religious laws and to all men who make them.
Some here may choose to "leave well enough alone" because they have nothing better to offer these people. But I believe I do have something much better to offer them. I would encourage them to develop a personal relationship with Jesus Christ rather than with a religious publishing house. And I would invite them to attend Church with me and my family and encourage them to become part of a new spiritual family, one whose love for them and friendship with them would not be contingent on their total loyalty to a few men in Brooklyn, New York.