Also, if the Flight 815 is really in the depths of the ocean, with bodies of all on board, Others must know this as well, considering they had contact with the outside world before the sky turned purple. Yet, their interest in Losties gave no sign of being intrigued by a super-natural encounter (in the sense of meta-physical, unearthly, even para-normal). I mean, if Losties are dead then it's either that Others are not that alive either, or that Ben's playing with his Ouija board a-la- island fashion.

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"Bear...? Is that you?"-- Hurley S03E4