Upscale gangs?
Or, perhaps, the cops don't care where they are when they start shooting ~ and most folks in residential areas anywhere really don't like that ~ particularly if the rounds come through the walls.
Best to keep all of that in commercial districts with cement block walls or steel frame.
Yeah, I walked real close to that block during a convention with a bunch of off-time. The neighborhoods seemed fine, nothing that I could complain about at all (except the real estate prices).