musical finds + JW's = strange thoughts

So, I'm unpacking boxes of music that I found in storage. In it is my beloved cd of Bach's organ music including the famous (spooky) Toccato and Fugue. A thought occurs to me. Today the Jehovah's Witnesses pestered me (reading a passage about how the mild-mannered, slow to anger people were God's chosen and I started laughing when they asked what I thought)

So the thought occurs...how do I arrange it so that there's a motion sensor on my front door so that whenever someone knocks that Toccato and Fugue begin to play (a hidden camera to see the reactions is just a bounus). Knock Knock, people selling me religious ideas I don't want. the house responds with 'horror' music. Ah, sounds too good. Knock Knock, neighbor kid selling me candy I can't eat. Bwah-ha-ha!