I stopped at around 15 due to a lack of people giving candy in my neighborhood. At 17 I decided to give out candy instead. I didn't set up anything big though, I had a few leftover decorations hanging and a giant bucket with a very visible rope. I would warn people when I was about to tug the rope, and then tug it only to have them be scared anyway. I kept this up since then and now hand out king size candies for impressive costumes. I also occasionally recruit neighborhood kids to cause some scares along the way. I'm afraid I might not have time to do it again this year though.