DH and I were just talking about this tonight and I think you're never too old. We were dressed up with the kids and having fun with them. Not that we went up to the doors for candy.
It makes me sad that no one around here does the Halloween thing anymore much and I think telling highschoolers they're too old for Halloween is part of it. We want our high schoolers to act "young" in certain ways like not being s*e*x*ually active, not drinking, no drugs, etc. but we tell them they're too old for other things like this. Very confusing I think and it makes them stuck in a weird spot in life. I say if they want to put a costume on and parade around the neighborhood then let them..pretty soon they really will be too old and will have their own kids to drag around the block