All you get from them is the same spoon fed asnwers you yourselves gave others at one time, so why bother? They aren't "enlightened" in any way. They don't have answers, because there just aren't any logical ones.
I found that when I confronted the elders it was because I was angry that I believed in the BS at one point and how could I have been so blind. I wanted them to give me some obvious reason why I ever accepted it in the first place, but talking to them just made me more and more frustrated and angry. The final time I spoke with an elder, I was asking numerous questions, and he was basically pooh-poohing them because I was just a child, what did I know? (I was raised as a JW and this conversation happened when I was about 15.) I remember being so ticked off that I was like, man, if you are threatened by questions from a kid, how the hell do you jam this crap down adults throats? Of course, there was no answer to that and meeting adjourned. I was a hopeless case, doomed as far as they were concerned.
Now that I am an adult and married and moved away from where I grew up, I still answer the door when the JW's come. It's a totally surreal feeling, almost like an out of body experience. I listen to the schpeel with a mind of trying to understand how people get caught up in this. The only time I didn't answer the door was when it was a witness with a small child; it was just too painful.
However, I do enjoy blowing their mind by telling them that I am not a Christian, and that their God believes in death and destruction while the true Gods hold all life sacred. I always tell them that they do not deserve to live their life in fear of an undeserving God that was set up by heretics including the apostle Paul in order to have control over fellow man, and that there is a healthier spiritual life waiting for all of them if they have the courage to embrace it.
That always sends them running! Ha! :-)