I never have and think that's the norm. However, had a couple of "reverse trick or treaters" over the years--nearby neighbors dressing up and bringing little bottles of adult beverages and/or other treats to hand out.
Many years back we had a couple young trick or treaters but none since then. We always buy a big bag of Reese's Peanut Butter Cups to have on hand just in case and are not disappointed when we get to enjoy them post Halloween.