Most JW's that I went Dto D with back in the day, were total crap at even starting conversations, so they never got to try the art of overcoming a conversation stopper.
I used to work on my own if I could, 99 times out of a hundred, that way nobody got to see that I had some great chats with people, but that I was not actually trying to recruit.
I had one lady say to me "I have enjoyed talking to you, I just can't stand those Jehovah's Witnesses " ! Result !
Another guy I remember invited me in for a drink and chat, I am sure he didn't have a clue what I was supposed to be there for, Tee Hee.