Milwaukee Public Schools will add its name to a growing list of school districts that allege major social media platforms — Facebook, Instagram, YouTube, TikTok and Snapchat — are “substantially” contributing to a crisis in youth mental health. Across the U.S., more than 1,400 school districts have filed lawsuits alleging social media companies intentionally target young people with their products and prioritize profits over users’ mental health, according to Keller Rohrback L.L.P , the law firm MPS school board members voted this month to represent the district. “(Social media companies) have made choices to target youth, to maximize the…..