I've been studying with a JW acquantaince for about a year and have tried to stop it politely many a time. What can I say, these people are persistent!!! Last week I finally presented my JW friend a range of issues / concerns that I learned from this site and others such as Freeminds. It's funny now that I've presented my apostate literature my friend wants to return with another sister who is a better "teacher" than she is. Poor thing, she really believes that I'm having trouble with certain issues because she's not doing a good job of explaining things!
Now that you are presenting information from so called apostate sites emcee I don't think it will be too long before they stop coming. The more experienced JW will probably put an end to it pretty quick. They don't like to be confused with facts. Anyone who has been a JW long knows when to cut and run. If for some reason they still want to come I would get Ray Fanz book or another book by an ex jw and show them what you are finding in it and ask them to read it. I think that will do the trick. But who knows maybe you will open their minds and they will begin to think and free themselves for the Watchtower bondage. You really never know what they are thinking even when they are defending the WT.