As for me I just let them blather on. At one time I thought if you pointed out the errors they would see them and change. Now I realize that each of us is on our own path it is impossible to force someone to be on the same path as I am on. I don't believe that God is going to kill them if they don't think like I do so I don't have that pressure on me. It took me a long time to wake up and there was a time when it didn't matter what facts were presented to me about the Watchtower I would have bocked them out.
Then again I there are times when I feel like blurting out " Are you f'ing stupid or what?"