Vandalism as Art?

A Russian man who claims responsibility for defacing a painting by Mark Rothko at the Tate Modern has told the BBC: "I'm not a vandal."
The painting, Black on Maroon, one of Rothko's Seagram murals, was written on with black paint on Sunday.
Vladimir Umanets, founder of a movement he calls Yellowism, claims to be responsible but denies criminal damage.
Read more here from the BBC.