Hi Blackbird Fly, Why not ask them, "Why are you bringing reproach on the WTBTS?"
When they deny it or ask why are they bringing reproach on the WTBTS, ask them, "Why are you behaving in an unChristian manner and like a member of a dangerous cult?"
When they say that the WTBTS is not a cult, tell them, "I agree with you that the WTBTS is not a religious cult, but it is a dangerous cult. Visit www.freedomofmind.com to learn what a dangerous cult is. Ask yourself why the WTBTS does not reference any recognized and reputable cult experts like Steve Hassan on www.jw.org?"
When they say that they are behaving like "True Christians", then ask them, "Show where in the Bible did Jesus Christ teach shunning or not associating with people who did not believe as he did. If you are Christians, you should be following the examples and teachings of Jesus Christ, and not what "imperfect men" teach JWs."
Peace be with you and everyone, who you love,
Robert