This curse of the noisy neighbor is an extremely sensitive subject. It is almost 100% guaranteed that if someone object, not only things might get worse, but he/she will have a life long enemy! This is the very reason that these morons carry on without a care in the world.
Well, the only other thing on could do is to create a louder rumpus than him! - but how many of can resort to that? In the absence of the law, we are helpless IMHO.
I am presently experiencing not only loud music, but over grown trees in close proximity to my house. Now I have decided to relocate (just after 2 years)!