Sabastious, you said, "It is extremely complex if you want to have them even begin to understand your stance and even possibly see where you are coming from. You will never sway a JW, but it is possible to help them see that your position is valid and that it is impossible to judge where people will be after the "JW Armageddon..."
Actually, as Moshe pointed out above, it wasn't the long, involved explanations that got me thinking - but then, as I've posted elsewhere, I was NEVER a "good little Jehovah's Witness girl" - it was the scripture at Exodus 19: 16-19 that CLEARLY describes a volcano erupting, but the Isra-EL-ites and their 'god' had NO CLUE as to the real nature of the mountain... Which I first noticed when I was 7 - 8...
It was the guy at the door when I was 12, who told me, "Those people are using you!" When I asked him to explain further, the adult sister accompanying me gave him the 'evil' eye, and he just repeated himself to me once more, and shut the door. I almost hammered on the door, but that blasted sister kept me from finding out more...
As others have pointed out, most JWs don't know the bible that well; they're fed a bunch of carefully-manufactured sales pitches with just a 'dab' of scripture... To make them feel 'righteous'... So long, involved biblical explanations won't work very well...
Ya just never know what might work... Someone might even respond to the "I'm a devil-worshipper" comment...
Zid