Last Friday, Blizzard clarified on the rumor spread online: the World of Warcraft sales in Australia were  Legitimate.(Via blizzplanet)

The announcement is as below:

Blizzard Entertainment and its affiliates work very closely with the Interactive Entertainment Association of Australia to ensure that we are in full compliance with Australian law as it relates to the distribution and operation of our games, including World of Warcraft. We'd like to reassure all of our players that World of Warcraft is currently, and has always been, distributed and operated legally in Australia.