Scaremongering just hit a whole new level underground, with Subivor -- the subway survival kit. The website (after a short video montage of all the ways the subway will ultimately become your tomb) warns straphangers:Dear Subway Commuters, Did you know that there are hundreds of subway related fires that occur each year? Did you know that there are 27,817 structural fires that occur each year, that's an average of 2,318 per month?And there's always......