Is Sergeant D a Virginia Resident?

Upon exiting last night’s Immortal show at the Sonar in Baltimore, Decibel spotted three concert goers pilling into a vehicle with the following vanity license plate: “WGRSLAM”. It’s a little grainy, but I can assure this image has not been doctored in any way.
Anyone thoroughly confused by the meaning/origins of said plate is encouraged to score a copy of Decibel’s June 2009 issue, featuring our special “Slam Metal” report.