I shut my light off at 8:00 because by then I know the little ones are all done trick or treating and I generally don't want to deal with the teen agers who are out at that point. So, I guess I am wiht the stopping at age 13 or 14 crowd. I know I t or t'd into jr high, but not into high school.
The last year that I kept the light on until later, I had this group of 4 or 5 older teens come to the door. Rang the doorbell, I answered. No costumes they spoke not a word. So I said, "Hi, what can I do for you?" One kid says, "We're trick or treating." I replied, "Oh, what are you dressed as? Surly teenagers?" One laughed, one glared at me and the other ones just looked confused! I did give them candy, but that was the last crowd for me.