I think both Young and CMD share the blame. Young for obviuos reasons, but CMD afforded the NCAA the opportunity to cast the deadly "lack of institutional control" charge into the fray. CMD allowed these things to happen, and as a direct result from his failure to properly handle his coaching staff, the players got out of hand as well.
As far as CGS's role in this, I think he had a little to do with it too. I have reaad enough to kknow that when the NCAA caming in looking for skeletons in Bama's closet, UA officials (CGS included) seemed to be uncooperative at best. Smug is a word I have heard to often describe the UA officials. Enough so that when the NCAA came back, they had a score to settle.