Richard Richard:
You could always try what I did. One day a couple of old gals stopped by to preach and noticed there wasn't a lady present(she was in Hawaii). The very next day they showed up again but this time there were a couple of nice looking younger ladies with them. I had just gotten out of the shower to answer the door so my attire consisted of a towel.
Ladies I said I only believe in three things eating, drinking and f*cking at which time I dropped the towel and opened the door saying come on in.
A friend did something similar back in my uni days. Near where I lived they put up a JW kingdom hall and proceded to start coming to our door every weekend, usually early in the morn when we were nursing hangovers! One weekend my firend had had enough and just let them have it. "Fuck Off! We tell you this every fucking weekend! Which word don't you understand, fuck or off?". It was brilliant.