This special edition is part of our Guest Prudie series, where we ask smart, thoughtful people to step in as Prudie for the day and give you advice. Today’s columnist is author (and Slate writer!) Dan Kois. Dan’s most recent novel is Hampton Heights: One Harrowing Night in the Most Haunted Neighborhood in Milwaukee, Wisconsin , which the New York Times recently called “a comic, gently spooky ’80s tale of boyhood, community and Burger King.” We asked Kois to weigh in on a new trick-or-treating