I've lived in a neighborhood with an "enforcer". Let's just say most of us were happy when the police showed up from time to time.
I'm amazed by SF and close areas utter disregard for what is normal crime wise. Most people in most cities don't have a story about their car window being smashed in and rummaged through. Every thread I see here / on reddit about SF someone mentions that its completely normal and should be expected there.