I have friends who live in a townhouse in the eastern suburbs. There is an apartment block behind them that is apparently owned by the one person. It is backpacker central. There is constant noise from this block. My friends have called the police on more occasions than they care to remember. After each police visit, my friends are bombarded with bottles and debris from their party and called offensive names. My friends have complained to every governing body they know. Still they have to live under these conditions.
To make matter worse, the townhouse next to them is rented out to some more backpackers. My friends have asked them to keep the noise down. This resulted in the “backpackers” parking in their car so they couldn't move it (they had to catch taxis to work that day). They are not in a position to move out (and why should they?) I am passing all the information on this ruling to them.
I have been a landlord myself in the past. It only took one phone call from an irate OC members (at 7am on a Sunday morning!) for me to warn my tenants that offensive behaviour (of them or their guests) or excessive noise would not be tolerated and they would be out!
I count my blessings that I have only had the occasional party (with good behaviour and a bit of music) in the places I have lived in. I cannot imagine living with constant noise!