I like Gary's outline. It hits all the high notes for an outsider. I heard a speaker once, for impact, had the entire congregation rise. He then asked people to sit down who say, were wearing jeans that morning, women in pants, men with untrimmed hair or beards, and so on and so on. After everyone was seated the speaker explained that NONE of them would be considered acceptable in a JW congregation.
You could then go on to talk about outward cleanness, how important it is to JW's and maybe tie in the scripture about vases clean on the outside. If you know what I mean. If you could help them understand that underneath the cult-talk there's a scared human being, they might start to develop some compassion for the life of the JW.