Teenagers are experiencing a mental-health crisis. And though the science is messy and the matter isn’t settled, many suspect that social media is, in some substantial way, tangled up in the problem. Following this instinct, legislators and regulators at both the state and federal levels have suggested a slew of interventions aimed at protecting young people from the potential harms of social platforms. Many of these efforts have so far fallen short on legal grounds, and broadly speaking, the status quo remains. This week, we learned of a new approach intended to protect kids from Big Tech. On Tuesday, a joint lawsuit was filed against Meta by the attorneys general of 33 states, deploying consumer-protection laws to try to hold the company accountable for harming young people. It claims that Meta deliberately got children and teenagers “addicted” to its platforms, that this addiction directly causes physical and mental harm, and that the company lied about it. Read: Why American teens are so sad “Just like Big Tobacco and vaping companies have done in years past, …