It's from Australia, what do you expect. It's like believing an American story titled "Christians found to live ten years longer and have bigger dicks."
Addiction is a word that gets thrown around alot. It's replaced the words "obsession", "fixation", "compulsion", and in this case, "hobby". Why? Because addiction implies a cure. When men used to spend hours in a basement making model planes, nobody batted an eye, and that was with model airplane glue in an enclosed space. If someone has thirty pairs of shoes, are they addicted to shoe shopping? No, because every pair of shoes bought stimulates the economy, whereas another 4 hours spent playing a game adds nothing. Hunting is a sport, yet when someone kills something in a video game, nothing actually has to die.(Disclaimer: I got nothing against hunting, as long as you eat what you kill.)
Addiction implies a chemical dependency. Without drugs, no addiction. I've known quite a few Oxycontin addicts, and to compare their situation to someone who plays WoW too much is insulting. To say nothing of Heroin addiction, which can actually kill you.
I believe Bob Saget made the point best: "I used to suck dick for crack. Did you ever suck dick to play video games?" (paraphrase. He was originally talking about marijuana)
Well, I'm done with my rant. Maybe I'm just irritable because I haven't played any games for three months.