Madison starts its weekend-long Halloween revelry this Friday, with area officials urging participants to celebrate responsibly or face ââ?¬Å?strong actionââ?¬Â in the future. While this warning may seem standard, it is far from hollow. A similar celebration in Boulder, Colo., where reckless behavior drove the city to discontinue its Pearl Street Mall Crawl, could foreshadow the future of Halloween in Madison.