Vanity license plates are a true sign of a douchebag. That's what bumper stickers were for. Now you can never get away from a crime scene. "Hello, 9-1-1. Someone with the license plate, BIGCOCK, just hit me and drove away. (pause) No, they did not hit me with their big cock." This driver is obviously a cat lady, but then why is there a dog in that car?! Has she betrayed the species that she once loved so much?
What could have happened is that she bought this car used and it already had the license plate. That must suck for people who buy a car with a horrible vanity license plate. You either have to spend your own money to get it changed, or you just have to live with being CATLADY despite having a huge dog.