Banksy makes another great point with this graffiti piece features the slogan if graffiti changed anything it would be illegal in a style which looks as though it has been dawbed on the shirt by the rat with his paw as we all know graffiti is illegal so we can assume that banksy believes that graffiti in fact can change things if it carries the right message 100 cotton banksy tshirt 10 of all royalties from our banksy t shirt range are donated to charity you can find out more ab