I only had nine tot's this year because of the weather, so I don't have much to go on...but mine were polite this year. There were some that were quiet, though, and didn't talk...but weren't rude or grabby. I will say, though, that I hardly ever hear them say Trick or Treat any more, which is so sad.
Honestly, I was just glad to not have another group of adults standing on the sidewalk yelling to the adult, that was with kids at the door, to make sure to get them some candy, too, in a somewhat demanding manner. That kind of made me angry last year, but I was nice and gave them some anyway in the several bags the lady thrust out towards me...the adults are so much worse than the kids anymore...how can the kids learn to be polite and thankful with adults like that raising them??