Ozzy Osbourne was the devil incarnate. Now that I know him, he was just drugged and drunk. No demons involved.
Many many years ago I remember seeing an interview with Ozzy osbourne and the subject came up about his alledged devil worship. His reply, paraphrased, was, "I can't hardly conjure myself outta bed how am I gonna conjure up a evil sprite"
As for disapproved rock albums, especially at Bethel. We just found old safe album jackets and put the records in them. Chances of the records being pulled out was nil.