Yes they do. Used to live in an exurbia neighborhood and there were tons when I was a kid. Then for a few years it got quieter in my parents' part of the neighborhood. Then new people moved in and more people had babies and now people are back again. Later I moved to the city and no kids were trick or treating... Because it was a college town. Moved again to a place where families live and lo and behold there are trick or treaters again but it's a bit different cause it's medium density so kids trick or treat at stores too... Pretty interesting. I think there are more people leaving bowls of candy out though. Kinda lame.