Some of the answers in this thread are just hilarious.
If you want the data gone for good, this is the process:
1. Wipe the drive with a secure wipe program
2. Take the drive apart and drill holes in the platters
3. fuck up the platter surface with a grinder
4. throw the platters away in different dumpster
Or, use a hard drive shredder.
Water won't do it, the oven won't do it, and you don't want to put metal platters in your microwave
