This would make for a great hidden camera gag. Have a pot-bellied, middle aged man smoking a cigarette show up at someone's door on Halloween. He would maybe be dressed in jeans and a tanktop and hold out a huge garbage bag and ask for candy. When they give him some, he would say something like "Is that all you can spare? I need some more for my wife. " Then at the end he would threaten them if they refused to fill up the bag with other goods.
What do you think?