Nothing increases the risk of servers catching fire like government investigators showing up to investigate allegations that North Korea hacked the servers.
Or investigations into a major financial scandal in a large French bank!
(While the Credit Lyonnais was investigated in the 90s, both the HQ and the site where they stored their archives were destroyed by fire within a few months)
>This file contains the complete set of papers, except for a number of secret documents, a few others which are part of still active files, some correspondence lost in the floods of 1967...
>Was 1967 a particularly bad winter?
>No, a marvellous winter. We lost no end of embarrassing files.