Hi Shawn,
A similar experience happened to me quite a few years ago.Just before the start of the meeting on a Friday evening .After I had paid for four or five different books a short tubby guy who had a stick in his hand ,he was opening windows with it,raced up from the front of the hall and started to harrangue me asking me where I had got the books from , were they paid for and if I was disfellowshipped etc. I told him that I had quit many years ago, his attitude was arrogant to say the least.He said, "you have a spark of interest,yes?" I said,"No ,I'm reinforcing my belief that you are a lot of tossers mascurading as christians and I believe in the statement ,"Vengance is mine sayeth the Lord " which means if I stick around long enough,one day I will see you and your excuse for christianity F*** yourselfs".
Needless to say I have never been near the Satanic house of correction since.It always gives me great pleasure relating this true story to the JWs' who like inviting me to their meetings when they come a knocking.I also never fail to mention that my local church offer a really warm christian welcome and there they can learn how to follow in the footsteps of Jesus. If they make the statement that they are discussing the Bible I always say " In what way can I help you understand it?" I also keep plenty of blood donor appeal leaflets handy ready to give out just as they take their leave.