From TRex at Firedoglake:
In a town so tough that most murders get just a few paragraphs in the paper, somebody called The Sun about 8 a.m. yesterday with a tip about a vandalized billboard.
By noon, the story was all over the Internet, Rush Limbaugh was kicking off his national radio show with it, and City Hall was fielding calls from as far away as California. By 5 p.m., the story had become one of the three most popular individual articles in the history of the paper's Web site, with nearly 200,000 page views.
There's a reason the story had legs. The paint-splattered billboard featured Limbaugh's mug. And the tipster was a spokesman for a city agency - the one responsible for cleaning up graffiti - who let it be known that he was no "dittohead."
More details from The Baltimore Sun.