At Los Angeles' Museum of Contemporary Art (LA MOCA), a big new survey called Art in the Streets looks at the last forty years of graffiti. Not coincidentally, the LAPD arrested several graffiti artists the same week of the exhibit's opening – some of them, artists with work in the show. Arts writer Carolina Miranda tells Kurt Andersen she thinks the reaction by the authorities is overblown.    Should graffiti artists be arrested or given museum exhibits? Or both? Leave a comment and let us know.       Slideshow: Graffiti Art, Inside and Outside the Museum

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