My friend was pulled aside and the one who directed the bible study said to him: "Do you know why I never call on your to pray?" My friend said "no". Then the pompous prick said to him "Because you don't wear a tie."
I think it hurt him for a long time. He never forgot those words. He wasn't good enough for God because he was not dressed right.
I think deep down, my friend may have known there was something "not quite right" with the org. but just couldn't put his finger on it or reason it out. If he had had a non-JW friend at the time it happened, maybe someone could have brought up the absurdity of it and what Jesus's rules were. I think it could be very positive to encourage JWs to have non cult friends. Especially those who might be questioning and seeing the cult for what it is.