Ask, and you shall recieve.
The RTA has painted over large slabs of graffiti along the CityWest link. They've also cleaned a number of traffic light cabinets in Drummoyne.
RailCorp have painted over bridge graffiti in Rhodes.
Sydney Water have cleaned up one of their pumping stations in Ryde.
Canada Bay Council have towed away a handful of abandoned cars and removed graffiti from some local playgrounds. Leichhardt council have also removed an abandoned car that I spotted recently on their patch.
Energy Australia have been busy cleaning their kiosks.
It's just a matter of telling them where the problem lies and asking them to fix it.