Walls are actually making things worse. “No one can see what is happening in your home so no one can help,” she told the [South African] Daily News. They keep people from being each other’s natural lookout. And they are an even bigger barrier to social cohesion, in a country that needs it a lot.
Further, Marks told Quartz that high walls not only fail to curb crime, they attract criminals—once inside, the criminal is as isolated as the homeowner, free to do as they please.
December 17, 2014
High security walls may increase violent crime.
This is interesting, albeit about South Africa. But the basic idea is this: