Cindy: Too Old To Trick-or-Treat?

On her Facebook wall, Cindy sez she’s sad: “How old is too old to trick or treat? I may just have to go out on my own since Sam is “officially too old :-(:-( ” I remember my kids going out for a short while as teen-agers to collect some treats in the Loch Haven area, usually later in the evening. Moi? I only trick-or-treated once in my life, with my cousins in the town where they lived. I grew up on a 500-acre dairy 7 miles out of town, with orchards, ranches, and dairies all around. Not conducive for trick-or-treating.

Question: How old is too old to trick-or-treat?