In the 1960s, we were not allowed to preach to ministers. First, the fear of Bablyon the Great was too great. Second, only the overseer could make those calls. I've spoken to several ministers who were approached by Witnesses. Unlike most people, no one made fun of the Witnesses. They smile at how readily they were able to turn their minds inside out about Bible knowledge. It isn't a fair fight.
Most clergy talk about scripture in context. I actually thought any JW could wipe out professional clergy but all the quick Bible cites, out of context. In fact, when I read my Bible today, I still became nauseous at the most beautiful Bible verses b/c I heard them so often they were a joke. I find it amusing b/c Witnesses are so certain that they know their Bible and everyone else is a fool. They do know WT lit. I guess bemused is the correct word.
I'd love to the fly on the wall when they encounter a rabbi, old school Catholic priest, or Pentecostal minister! It must be so entertaining.