It is tiresome to argue about whether graffiti is art or defilement of public space. I would think the real questions are where and when and in what context. I've always admired this abandoned building on Insurgentes Avenue in Colonia Juárez, on the fringes of the honky-tonk part of the Zona Rosa. I would have liked to have been there the day (or the night) that the writer tagged the top floors.