Create your own gang of simple but undeniably spooky lunch bag faces to set along your window ledge and welcome -- or ward off! -- your trick-or-treaters.
Cut facial features from magazine photos and glue them to paper lunch bags.
Give each gargoyle a personalized coiffure by fringing the top of the bag, then twisting the fringe or curling the edges around a pencil.

Finally, place a stone in each to weigh it down, then set them out for all to see -- and for them to see all.