Noisy Neighbors

It was another long night pretending the next door neighbor kids WERE NOT throwing a LONG, LOUD party while the parents were out. At the last 3AM party, David made an anonymous police call to shut them up...and early this morning at 1AM David yelled at them over the fence to quiet down (and they did). He also mailed a letter to the kid's parents about these secretive behaviors that we've been tolerating for 5 years now ~ we've had enough. With a new baby arriving soon, we're going to need all the sleep we can get! How else can we solve this problem with the neighbors?