Halloween - Am I a grinch?

[Army Wife'79]

I love giving candy to the kids who come to the door in adorable costumes. But I have an issue and want you guys (Oh wait, I'm in the south now, so it should be y'all's) opinion on something. I absolutely hate it when old (16-18 yr olds) show up at my door with NO COSTUME holding a huge pillowcase totally full to the brim and say NOTHING when I answer the door. I mean shouldn't they say "trick or treat"? I really feel like saying "may I help you?" when they just stare and say nothing (plus they never say thanks).

My neighbors say they dont' give them anything but I thought this year I'd give them a PENCIL instead of candy and say something like "this is for your calculus homework". What do you all do? Do they get the same "good" candy that the little cuties get? Am I getting to be a grinch in my old age?