I like that
Some other ways to destroy the hard drive:
Open the drive's case. Connect it. While it's spinning in the open, put a bit of sand paper on the plater, or touch it with a screw driver.
Remove the stickers with the warnings about voiding the waranty. Put some dirt inside. Plug in, shake and hit the drive. Have the computer try to boot from that drive a few times. Guarateed head crashes and scratched platers.
Forcefully plug the power connector the wrong way and send +12V in your 5V logic circuits. They will fry.
Unless the drive contains some industrial secrets, or information about/from some secret agency or the military, it WILL cost horibly more that what it may be worth.