...Graffiti? Professor Peralta's lessons this term were genuinely the best. He didn't think she could top the last tattoo lesson, but graffiti was a very strong start. He'd raised his hand, planning on mentioning the fact it was illegal, but the seventh year Gryffindor covered that so instead when it was his turn to speak, he offered more about the process. "Graffiti can be found.. pretty much anywhere. It's usually created with spray paint, and it can be down free hand or some artists actually create their own stencils to mass produce."