Hey - I have a funny JW story.
Back in 1986 when I was in high school, I was home alone on a Saturday afternoon when two JWs knocked on my door. I opened the door and before I could even speak they launched into their speech. I tried to think quickly as to what to do next, and came upon a devious idea. I put on the most puzzled face I could make and then started using some simple phrases I had learned in my German classes in school.
"Ich verstehen Sie nicht. Ich spreche keine English. Sprechen Sie Deutsch, bitte?"
I just stopped there and gave them a puzzled look. The stopped, looked at each other then finally one whispered to the other, "I don't think he speaks English" I was trying SOOOO hard to keep a straight face as the one said (in the LOUD and SLOW way that for some reason people think will magically make a foreigner understand them better), "Were very sorry for bothering you sir - may the lord bless you and have a good day". Then they left. I closed the door and burst out laughing - I could not believe it worked (my greatest fear was them calling my bluff with one of them speaking fluent German!)
The best part was going to German class on Monday and telling my teacher that I used my German skills in a practical way over the weekend. My teacher got all excited and asked me to share the experience with the class. I proudly told the whole story and got howls of laughter from my classmates (and a look of huge disappointment from my teacher).