Thank you for all the comments! -- I like this topic when trying to plant seeds with JWs, as i have opportunity.
Sometimes i am unsure whether it's best to use questions that are more along the line of "disturbed outsider" who heard about the latest blood death, and just make obvious points, that would come from thinking about the topic Scripturally or logically. Or whether to have more facts on hand to refute what their standard replies are going to be. I don't want to seem like a "professional opposer"; sometimes that can backfire, and they'll write you off more quickly, than just a simple point or question from an outsider.