Sydney's gangs of graffiti vandals have taken their destruction to a whole new level and even crossed the ditch.
They are now making money off the millions of dollars of damage they are doing by selling DVDs of their exploits, which even feature damage done to New Zealand trains.
"I've viewed one of the videos and I have to say it's shocking," says Sydney Trains' Tony Eid. "Not only are these vandals damaging public property, but they're endangering people in the rail corridor."
The DVDs are sold online for $20, and profits are also made from YouTube advertising.
Graffiti vandalism costs Sydney Trains $35 million a year, and taggers are getting increasingly sophisticated – using smartphone apps to track the train's movements.
Watch the video for the full 3 News report.