It was over ten years ago, but I was trying to find what archive an audio recording of a score was in. The composer's widow had a copy given to her by the orchestrator and deposited it somewhere. I just did not know where and asked if anyone knew where it was.
I do not think it was wrong to put the kabosh, but even then a lot of collections held recordings from rehearsals and previews that were technically bootlegs. How is a online bulletin board supposed to distinguish what "boots" to allow and which not to? Just banning all seemed reasonable.