Why not treat the parents, too?
A police officer rings the door bell.
Officer: We have had complaints about the treats you've been handing out.
A whining child: Daddy, I want to keep going...!
Paul with beer bottle and glass: All good, officer! It's just barely still Oktober, and the last Oktoberfest must go.
A father with a beer: Just a sec.
Max peeking around the corner: We promise we'll only bring pumpkin beers after that, no xmas ales yet!
Another father with a beer: I think I'll have one more.
Sad child: When do we go trick or treating again?