Some people know, though we never will. But here's a guess for what it's worth. Anybody who's worked in a corporate environment can probably relate to this:
One day a bigwig at Blue Note/EMI decides to check out the BNBB. He/She is horrifed at what they see and read.
The crisis of the day ensues. Phone calls, e-mails, lots of raised voices, weight and authority being thrown around. "CLEAN UP THAT **** THING BEFORE IT WRECKS OUR NORAH SALES." Everybody runs likes frightened rats to do the "suit's" bidding. And so it is done, as down the ladder people deal with the fall-out from the bigwig's blow-up. As usual in these cases, the whole thing is a train-wreck.
Meanwhile, if you ask the suit today what it was all about he/she wouldn't remember a thing about it. Probably give you a blank stare if you mentioned the Blue Note Bulletin Board. "Uh, what's that? Gee, I didn't know we had one."