If the trick-or-treater is polite, isn’t acting entitled, and is just trying to get into the Halloween spirit, I honestly don’t care what age they are. I love Halloween, I love handing out candy, and I love seeing people’s costumes. It’s always kind of bothered me when I hear people making comments about whether someone is “too old” for trick or treating. It’s a rather strange thing to gatekeep, imo. It’s all good fun.