"Graffiti is a way for people to express themselves when they don't feel they can do so publicly," says Joe Austin, a professor of popular culture at Bowling Green State University.

“Graffiti is a way for people to express themselves when they don’t feel they can do so publicly,” says Joe Austin, a professor of popular culture at Bowling Green State University.

Just then the train pulled into the Bowling Green station. The doors opened, a rush of humanity swarmed in, and then suddenly, she was gone.