Consider using big data to figure out who is going to go off the rails next. Is this a taboo use of big data? Guns are just tools and can be replaced with equ

Consider using big data to figure out who is going to go off the rails next. Is this a taboo use of big data? Guns are just tools and can be replaced with equally dangerous tools. It's the mentally unstable that must be detected before they cause mass harm using unique means. Imagine a kid that gets bullied and has the skills to mass hack self driving cars. Or perhaps they have access to hazardous chemicals and modulating pumps that can bypass check valves on water mains at a school. There are infinite bad things a person can do. Can we not engineer solutions to these problems?