Getting any data other than background noise off a
securely erased hard-drive is both unlikely and very very expensive.
The idea that identity thieves are trolling though landfill looking for your Uncle Jim's junked hard-drive just so that they can spend $100,0000 and a month poking through it with a scanning-tunnelling electron microscope in the hope of finding his social security number or bank logon is farcical.
Unless you are a big company with
real "secrets" on your HDDs then these elaborate destructions, though fun, are silly and wasteful.
It is far easier and faster to find out your soopa secrits by just hacking, snooping and wardriving - most of them are on the web somewhere anyway!
Get real guys!
Mac