Wow, have you tried setting up a good perching place for your birds(keeps them off cars), and big mirror-(plexiglass if possible) really helps keep him and every one happy, well, maybe not the bleeding children.
I have always had relatively quiet peacocks. I have never kept more than 1 male at a time with 2 females. I was taught early on that bonding them with chicken chicks and raising them together helps, 1)keep them close to home, and 2) keeps them quieter. For what ever reason, my peacock is...