That's Scottie Roberson, whose nickname is "Racer X" and favorite number is seven.  He combined the two for his vanity plate: XXXXXXX.

Turns out that decision flagged his car for over $19,000 in parking tickets.

When Birmingham parking patrols find cars without license plates parked illegally or at expired meters, they enter seven X's in place of the plate number, city officials said. The parking citation form calls for a plate number, and the practice is to use X's when no number is available.

City officials are working to change the entry system to keep Roberson from receiving any additional tickets, Odom said.

"Maybe we need to go with nine X's, or maybe we just need to leave that part blank altogether," Dawkins said.

Link via The Obscure Store & Reading Room.