Every year I see debates online about how old is, "Too old," to go out and say, "Trick or treat!" for some candy. I would argue you're never too old. I don't get why people get angry at teenagers who dress up and go door to door. Would you rather they be sitting at home on their phones or be out...but causing mischief? If someone wants to put forth the effort to walk around and show up at your house and request candy, give them the candy. Let folks enjoy things!