How about it? Of course you have to atleast be able to pass as a teenager, but imagine being dressed up as a publisher and opening your bookbag at the door going "Trick or Treat!" And why not, it's as good as any other ghost or demon. And of course, it's an opportunity to give a witness, about the Witnesses.
I used to have a similar idea like dressing up as Santa and trick or treating or something.. Anyone remember what that was?