I know how you feel. I'd like to tell them so many things, but the panicky feeling overrides, maninly because I know how it would end up. Whatever I said would elicit the standard comebacks, "Those were just men, we should worship Jehovah." Or, "We wait on the slave to clear that up."
Actually, the only time I ever really spoke to JWs was when I was on vacation in Colorado. There was obviously a convention going on. As my family and I were going out the lobby doors, a large mass of dressed up people came out, some with their badges. I said, (actually I yelled) "Oh, the generation that was alive and at an age of understanding will not pass away until Armageddon, NO! the generation that is alive in 1914. No! Wait! The generation is the contemporaries of the time that don't accept Jesus. No! Wait! New Light! The generation is the annointed! (the latest change, overlapping generations, had not come about) I am sure no one in that large group was late that day, as they could not get away fast enough.
Come to think of it, I felt great afterward. I can't wait to see more JWs.