Message to Noisy Neighbors: Blast your Music Inside, Don't Ruin our Summer

You are getting ready to relax with a book, sip a cold drink or go out to the backyard and lay in the hammock to take a nap then the noise starts.
You got stuck with Neighbors from Hell who think nothing of blasting their stereo not in the house mind you but in their backyard so they can annoy the whole neighborhood.
They don't seem to think that some people nearby might be sick, have a small baby or just need to rest because it is past midnight and they happen to work during the day.