By Maria Dinzeo, Xu Yuan ( December 8, 2025, 20:18 GMT | Insight) -- School districts cannot pin a youth mental-health crisis, or their multimillion-dollar plan for fixing it, on any design feature of Instagram, TikTok, YouTube or Snapchat, the social media giants argue in a flurry of briefs filed over the weekend in massive multi-district litigation over the fallout of allegedly addictive algorithms.Major social media companies pushed back against US school districts’ claims that Instagram, TikTok, YouTube and Snapchat helped fuel a youth mental-health crisis, arguing in a series of filings over the weekend that the districts lack evidence linking any specific platform design feature to the billions of dollars in damages they seek....
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