Re: Could be worse...
A/C because it's an ex-colleague of an old friend - not my story to tell, really!
Anyway, this chap was sent around the British Consulates and Embassies to perform upgrade work in their server rooms. On the back of the (very strong indeed) server room doors were metal hammers. If the building is invaded by unfriendly forces, the idea was to haul the hot-plug servers out and hammer the hell out of them, ideally before they stopped spinning.
I understand more modern devices take a SCSI command and detonate a vial of solvent within the drive to destroy them. Maybe others know more.