Dirty protest.

The article discusses the appearance of ghostly imprints on the walls of the Elizabeth Line stations in London. These imprints are caused by the grime and grease left behind by passengers who lean against the walls and sit on the benches. While some find the ghosts disturbing, others see them as a reminder of the human presence in these pristine spaces. The article explores the symbolic meaning of dirt and disorder and questions whether these ghosts should be embraced rather than eradicated. [Extracted from the article]