At least they aren't proposing a global tax on all manufacturers of violent games to offset the cost of on going research to help us play violent video games nicer, yet.
Don't get worried until they figure out an angle for politicians and bureaucrats to make money by imposing it on us. By then it won't matter how hair brained of an idea it really is. Coverage of this hasn't yet made it up to the level of Reuters or the Daily Mail or the Guardian. At least then WHO will have announced discovering a new global threat to protect us from with a tax. Our mental health because of violent video games.