DesperadoesPublished: July 21, 2004 omething went awry at the Aladdin Hotel in Las Vegas last Saturday night. Linda Ronstadt did what she has done at several concerts across the country this summer. She dedicated the song "Desperado"- an encore - to Michael Moore and urged members of the audience to go see his new movie, "Fahrenheit 9/11." Elsewhere, audiences have reacted to the mention of Mr. Moore by cheering, booing, walking out and sometimes glaring at one another in parking lots. At the Aladdin, a few audience members tore down posters, threw drinks and demanded their money back. According to...