All the searching and outrage about the anonymous blogger is orthogonal to the original questions - are the majority of songs on Grooveshark put there by employ

All the searching and outrage about the anonymous blogger is orthogonal to the original questions - are the majority of songs on Grooveshark put there by employees, by order of management (I'm guessing this takes away safe harbor), and is it possible for artists to get their music off of Grooveshark if they ask.