Well, if your only source for information about the USA was an MSM broadcast, you, too would probably think the whole country looks like Detroit. Something of the reverse is happening to us with all of these stories about crime in Britain - the happenings in lower-income areas of cities are being extrapolated by conservative bloggers and media outlets into an inaccurate picture of violence in the entire country.
If things were as bad in Britain as some SUN posters claim I think martial law would have been established long before this. The topic did give the opportunity to bash their favorite subjects, tough, “America and Americans” so it did serve its purpose. :O)