Remember when Laptop's neighborhood wanted a separate trick or treat from the poor kids? She wasn't part of this of course. We had a guy in our neighborhood growing up who would turn the light out on the black kids. What a loser. He died alone in his nasty old house not too long ago. Probably surrounded by all the Smarties and Necco Wafers he refused to hand out over the years.
I had some obviously drunk young teens stop at my house last year. I side eyed them but gave them candy. It's not my responsibility to parent them.
If they're with younger siblings, I'll give them candy no matter what they're wearing. If it's just a group of teens and they're in costume, I'll give them candy. If it's a group of teens just wearing regular clothes, I'll ask them what they're supposed to be, and then the amount of candy they get depends on how creative their answer is, but they still get candy.
Yes always err on the side of giving the candy!! This reminds me of this clip from Curb your Enthusiasm, lol