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Halloween in Columbia, Missouri, is much like Halloween anywhere else. Pop-up stores appear in non-descript strip malls, filled with the standard array of ghoulish kitsch: witch masks and Jack Skeletons, string cobwebs and tombstones. At dusk, trick-or-treaters swarm neighborhoods like costumed locusts. Candy is given out and eaten, as often by parents as by the children that collect it. 

���� students at the University of Missouri decided not to stay on the sidelines this week.