Oh my goodness, that is awful! :-(
It does cause a huge amount of stress to the people that have to put up with it. My parents live in a top floor apartment and their downstairs neighbours have a little yakky dog that is constantly barking, whether his owners are home or not.
My Mum often says about leaving the gate open, so he will escape, but she wouldn't actually do that! They lose so much sleep at night, because of the damn thing. The owners sleep with ear plug in, so it doesn't bother them! It's so inconsiderate.