This is like an article declaring, "EU Investigates MySpace for causing child addiction and harm" -- the people they're trying to protect don't use that product any more. The time to do this investigation was fifteen years ago, and the US government should have been the ones to do it.
Don't get me wrong -- fuck Facebook. I hope they have to pay billions. But the people that company is harming now are adults and the elderly. I'm sure fifteen years from now, once all those people are dead, there'll be an in-depth investigation and legislation about it.