It is a forewarning to cities that discount the value of their police force. Oakland is one of many places that crime is high, yet the city permitted its police force to deteriorate to where the police can't either serve or protect. It is a city too where the news media have become wary of field reporting because of the theft of their equipment, even while on the air.
In the story Oakland: Quan's neighbors hire security, Quan is the mayor of Oakland that has depressed the value of the police force even further with police morale the least of the city's problems in policing. And the sad thing is that these neighbors can afford the $800 bucks or so annually, but not the rest of the population.
Oakland is much like Portland, therefore the warning.