Energy Australia has put a link on their homepage to combatting graffiti. The downside of the new page is that they want all graffiti reports to be phoned in, which in my experience, is a pain in the backside. I can enter a report via their "contact us" web page in less than 30 seconds. It usually takes 5-10 minutes to do it over the phone (once you find their number, ring it, press this and that to get through all the prompts and then wait for an operator. On top of that, the hours of their call centre are limited - I generally find myself reporting graffiti at 10pm or later, and the call centre is closed at that time - and it's shut on Sunday.
I'm going to continue with using the web page, and see how things go.