As I walked past one of the UTS buildings in Chinatown a few weeks ago, I noticed a lot of graffiti on the wall facing the Entertainment Centre. It took me about 5 minutes of hunting through their website to find a contact for their building maintenance people, and I sent them an email as a bit of a stab in the dark. I was pretty doubtful anything was going to happen.
Going past again this morning, I spotted this bloke using chemicals and a high pressure hose to scrub the graffiti off. UTS never bothered to respond saying that they were going to clean it off - but this is as good a response as any.
If you ask someone to clean their property, generally they will.