A proposed California law would require social media companies to make chronological feeds the default for users under 18. (Associated Press)Social media companies design their feeds to be as gripping as possible, with complicated algorithms shuffling posts and ads into a never-ending stream of entertainment. The bill, dubbed the Protecting Kids from Social Media Addiction Act by its author, state Sen. Nancy Skinner (D-Berkeley), was announced at a news conference with California Atty. "Social media companies have the ability to protect our kids," Skinner said. But a prior law intended to rein in social media companies' treatment of young users ran into trouble in the courts last year.