then I read they dress to impersonate American blacks and sing songs with "nigger" in them etc.

On that joke site that milk monitor gave us a link to? Don't believe everything you read, especially on the Internet. And don't take as Gospel truth everything comic writers write in books either

We've got the makings of a moral panic on the basis of pretty inadequate information, and some very lazy reporting. Since we haven't had any links to the story itself, here a link to the BBC for a version.