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Think about it. What are the chief complaints about the celebrations of the saccharine? 1) Valentine's Day is too couple-y, 2) Easter is too Peeps-centric, and 3) Halloween takes too much planning. So the main event of Valloweaster would gently mock couples (1) by having them hop door to door dressed in municipally-issued, matching rabbit suits (3), delivering candy to single folk who would be free to pelt the bunnies with their choice of Peeps products, which no one but the most desperate would have to eat (2). I'm not sure what else would happen, but it's a start.