We have torn down three nests this year. (As I understand it, it is legal to tear down an empty nest.) They just go and rebuild across the street, which is not far enough away from the shrieking. We can hear them in our backyard when they are across the street. We can hear them in the house when they are across the street. The only common thing in our neighborhood that is louder than a baby mockingbird is the trash truck and the leaf blower of the gardener of the house behind us. Frankly, I'd rather listen to the trash truck or the leaf blower. I would say that baby mockingbirds are as loud as kids at recess and much more shrill and monotonous.