Because this is exactly what our PITA neighbours are doing as we speak. It's been going for about half an hour now. The noise is horrendous! Luckily DD seems to be sleeping through it at the moment.
NSDH is refusing to go and knock on the door and when I did nobody answered. :( They're ok neighbours usually but are so bloody ignorant they'll do whatever they like whenever they want to and to hell with everybody else. 