Owlkat, its not the postings that they care about, its the database that they want stopped.
Getting permission from the artist means squat. The artist can give you his/her blessing all he/she wants, but that don't mean a thing if they hire a publishing company to take care of their song. I wish it were (and it should be) that easy, cause we have a couple of hundred artist permissions. No worries folks, the goal is to keep them sending us songs that they want dealt with, and we'll remove them from the database.