I was a smart ass when i was younger.
I recorded the answering machine messages of a few JW's, and when they phoned me, I could see who it was with my display, so i put the cassette of that person, so they heard their own voice and answering machine message.....when they phoned me.
I did that to an elder too....
It was hilarious to hear how they reacted....
I did that because they would always phone for some kind of service.......would you go pick up so and so, would you come and mow the lawn at the hall.....so on so forth....so i got fed up.