This is why you should be careful of wiping your harddrive when getting rid of your computer:

I found the link on the Toronto Star’s online portal and giggled really hard. The gist of the story is that a fellow in the UK sold his laptop on Ebay and some poor schmuck bought it. Had to repair it when he got it, since it didn’t work. And when repaired the images stored on the HD were breathtaking. The purchaser of the laptop created a blog to embarrass Mr.Tofangsazan.