I have always thought illegal drugs had their own demographic maps, just like ethnicities but much harder to study.

So just like in any urban region there are areas where people of Italian descent congregate, or people of Korean descent, or Iraqi or east African or wherever, by the same token in any urban region there are places where the potheads tend to live, also those who prefer to use crack, meth, heroin, whatever.

Since people ordinarily do not submit to telephone surveys about their choice of narcotic, it's not easy to accurately draw the maps in detail, but I bet any police department could give you an idea within the particular city.

Nevertheless, the officer's comment in the story was that of an ignoramus. It's a shame that some policemen aren't able to keep their racism in check even when talking to the fourth estate.