Maria Abramović has crossed a line that even Jeff Koons and Damien Hirst are wary of. Someone was bound to do it eventually. She has not just taken art out of the gallery but into a realm of rock concert hysteria and teen adulation. To put it kindly, you can say her fans resemble the star-struck kids in old films of the Beatles. But what is the cultural price of mass intoxication? Is it a good thing?