in usa, down oct 31 celebrations sometime get out of hand.. on new years day, the max thing get out of control is drinking and driving and getting tickets.. (and hopefully no accidents)
but i have heard car tires torn apart on oct 31st by unruly crowd as part of prank.. (damage to property- few 100$ loss).. is that the extent of what can go wrong? people say about objects in candies.. not sure how they can do it and get away with it... does it get worse than that? how bad can it go or how bad has it gone, historically?
any thoughts from your experience/observations?