A few years ago, we called it quits for the twins to go out trick-or-treating, and this year we're talking about having this be #3's last year.
We do get kids coming to our door who are older than our boys, which feeds the fuel of their argument to let them go out again. Personally, I have a problem with a 19 year old young adult come knocking at my door asking for candy. Heck, I have a hard time with anyone over about 14 or 15 coming to the door, but I realize that my not liking it isn't going to stop them.
This begs me to ask the question; in your opinion, how old is too old for trick-or-treating?