It was supposed to be operational six months ago, part of Florida’s wide-ranging effort to prevent the next school shooting: a sprawling new database that would merge people’s social media posts with millions of records on individuals who have been bullied, placed in foster care, committed a crime, or even been mentioned in unverified tips made to law enforcement. The plan, however, has sputtered, an Education Week investigation found. The two biggest reasons: bureaucratic delays, plus concerns over exactly how much sensitive information can legally be shared in the way lawmakers envisioned.