Warning: Spoiler!I find it barbaric. Register it as a fake, stick 'FAKE' on the back of it. That's all that's needed. You don't have to act like a Nazi. The history of fakes itself is quite fascinating and informative. Blimey, most of Mark Ronson's musical output would have to be burnt as he wasn't around when the 1960s really happened! Fascinating programme though. The reaction says more about the arrogance of art collectors (and their fury at being caught out) than it does about the nature of art.