MOSCOW : More than a hundred Russian ballet fans rallied in Moscow on Saturday in support of a top dancer who says he is being chased out of the Bolshoi Theatre due to disputes in the wake of an acid attack on its artistic director earlier this year. The attack on Sergei Filin in January stunned Russians and exposed the bitter rivalries and behind-the-scenes power struggles at the theatre, a symbol of Russian culture since the 18th century.