This triangle is used by law enforcement to help clean up neighbourhoods. There are very simple deterrents, when implemented, are effective in preventing crime.
Crime is mitigated would be a better way to put. Sadly, your ideology leaves out a small percentage of people you deem essentially unexplainable. You have created labels for them like "psycho", "sadist", "pathological", "sociopath", "egomaniac" etc, but all of them while incredibly useful theories are inexact sciences. They all make attempt to explain the problems created by lack of family qualitatively, and quantitatively. We don't have a solution to what's shredding apart our family's so our best guess is to call out the culprits as simply animalistic. Animals murder and rape each other all the time, we expect it from them. But for some reason, for a few brief stretches of history across the globe, human family values were given the utmost importance in society, even to a fault at times. It was after that event took place that humanity started on a path that would literally skyrocket them into space and beyond.
-Sab