False. Or true. I remember the last time I chaperoned a youngster trick-or-treatin', with my high school girlfriend and a 5-6 year old friend of her family's. ETA I have no idea when I was last actually trick or treating, as in doing it. Lots of individual instances, but not the last time. I do remember the only time I went "wilding" as a teenager and throwing eggs out of a moving car.
TNP is the master of last-minute laziness in doing costumes. No one got it, so I was stuck being Hawkeye from the movie version of *M*A*S*H -- not my idea, but the hat and shirt kind of work for Hawkeye.