In my area, there was an a**hole who drove around the neighborhood every morning at 2:00AM playing that crap and waking up everybody within 3 miles (I have friends that far away, and they woke up to it). We called the cops and they did nothing, even though it was "disturbing the peace". So I stayed up one night and waited for this bastard. I followed him back to his house, took down the license plate number, vehicle description and address and gave it to the police. When they still did nothing, I put that information on flyers and posted them all over the neighborhood. Within 24 hours, the problem was solved. Somebody (or a group of somebodies) slashed the idiot's tires, broke all of the windows in his car, ripped out his sub woofers, smashed them to bits and sprinkled them all over his yard. Now we can all sleep through the night without worrying about a mobile earthquake waking us up. :snoring:
I'd say take it up with them yourself. Plant explosives where they drive by, with a warning sign telling them to turn down their music or death will occur. You may have to blow one or two up before they get the message.
Explosives are too noisy. But if you sniped his tires...