It hasn't yet, and I haven't heard this one before now, but Disney COULD do anything they want. If this is really, specifically, mentioned as a possibility in Birnbaum's I'd rate this as more than just speculation. My understanding is that WDW and Birnbaum 'co-operate' in the production of their guide, which is a polite way of saying that Birnbaum gets to use copyrighted photos not available to the unofficial guides as well as interviews with Disney personnel. In return, IMHO, Birnbaum tends to be less critical (honest) about some WDW issues. It wouldn't surprise me to see Disney put this out as a trial balloon, and if there's no uproar over it, implement this at some time.
Bill From PA