yep that seems to be the consensus. But just cause it's not a place you know of - or I know of, that isn't a definitive conclusion. theoretically, it really could be 'somewhere' in negril - just not a commonly identifiable spot.
i've not been to any of the beach areas at any of the Bloody Bay A/I's - and it could be one small pieca beach at one of them -
Unless there's one person who's really been to EVERY single inch of the entire negril beach, we can't say definitively.