What would happen to a person if I took a car battery and connected a metal wire running into a hot tub?

This takes a short explanation. 1st of all I dont want to seriously hurt anyone. I live in an upscale apt community. My apt overlooks the pool and hot tub. Little did I know this was a bad mistake to take this apt for its "views". Well 11 of the last 14 nights, teenagers have been showing up @ all hours(1:00-4:00am!) being loud and drinking in the hot tub. Normally I wouldnt mind , but I have a 3yr old that easily wakes up from their obnoxious behavior and then I'm kept up. I have lost countless hours of sleep over last 2 weeks. Need a way to "thwart" them from returning. I have called the police 2 times and they havent even bothered showning up! I'm sure the whole "teenagers in the pool" doesnt exactly get them rushing out there. But COME ON! I dont know what to do!Would a car battery shock their *** enough to make them think twice or could it hurt them?? hehe