Never. My mother is in her fifties and she went today. (Only to a few houses, and she wore a mask that covered her head completely, and took off her wedding ring so people wouldn’t be on to her, but she went.)
I’m seventeen. I went a little, but only to a few houses. I was lazy and didn’t really wear a costume, only a beaten up hat. That was wrong of me. You should wear a costume, and put a little effort into that costume, if you’re going to trick-or-treat.