When is it too old to go Trick or Treating?

I think that a child will make it clear that they would rather go to a Halloween party than to trick or treating. Having seen engineers and artists, and artistic engineers, creating some fantastic costumes, I don't think that there's an upper age limit on Halloween - even the dead and undead can be found at such parties. Simply put, I think your child will let you know when they don't want to do the same thing and want to do something different, such as a party, a haunted maze, or some other activity. At some point, you might find it interesting to introduce them to something quite different, such as Dia de los Muertos or a Halloween-inspired organ performance.

I have a nice simple rule of thumb: If they're old enough to do it by themselves (i.e. without an adult accompanying them) then they're too old.

I find myself far less concerned with the older kids trick-or-treating than the parent with an infant who clearly should not be having candy coming to the door to get their candy. I think a long as there is effort in dressing up and their are respectful, there is no problem with older kids going out. I do expect a thank you though and call kids out on it if they fail to say thank you!

My view is they are too old, when they decide they are. We get a wide range of kids, although we don't give candy away - neither my wife and I really like to encourage that sort of thing, more importantly we get a small amount of treaters due to the location of our street. Buying candy means we'd eat most of it after, so we give away small decks of playing cards, or small containers of Play-Doh. When I took my son out we saw quite a few teens out dressed up, some were imaginative and other's just had on head bands with springy things on top. Personally I'd rather have nGinius' neighbors, but we get a few well decorated houses (mine is slowly getting there) and often the kids and parents dress up similarly so it's like a roving party.