It's always something. "The Bomb" was a biggie when I was growing up, then M.A.D., and the media are always serving up a fresh steaming platter of "Wesa gonna die!".
Sooner or later, they'll be right. Then what? WIll the people gather in churches to pray away their last hours?
Will they roam the streets looting and killing and burning? (After all, there's always a better TV to watch the End of the World on (in living color).
The biggest single problem, though, is that those who are convinced they will die tomorrow or next week, or in twelve years, make no plans for the day after tomorrow, the week after next, or twenty years from now: they see that as irrelevant. So, generations who are already afflicted with short attention spans are, in their minds, afflicted further with the notion that life is short, so grab what you can today. For some--all too many--that refuge they seek is far from spiritual, but completely material or the miasma of drug induced euphoria.
You'd think those in such proximity to meeting their Maker would see things differently, but many do not know Him, either.