We had a brothel in our block. We rang the local council. A council guy came to see then sent the owner a letter. The tenants who were running the business were gone in a week. Apparently using an apartment zoned residential as a brothel was illegal in NSW. We are also very close to a church and a school which contravenes the law as well. It may be the same in Canberra. If the owners were running the brothel they could have been prosecuted.
Apparently the council guy came , saw the men hanging around then checked ads online and rang numbers until he found the address. This was the evidence. The council told us they close down around 30 illegal brothels a year! The irony is that here are two legal brothels that have been operating for over 10 years less than 5 minutes walk away!