The Massachusetts Supreme Judicial Court has ruled that Meta Platforms must face a lawsuit brought by the state's attorney general, which alleges the company deliberately designed Instagram to addict children. The decision marks the first time a US state high court has weighed whether a federal law that typically shields internet companies from liability over user-generated content also protects them against claims of knowingly engineering addictive products for young users. The ruling is seen as a significant legal development that could open the door to similar challenges against social media companies in other states.