Hacker Arrested for Octopus Virus

A Japanese man has been arrested on suspicion of writing a computer virus that destroys and replaces files on a victim PC with manga images of squid, octopuses and sea urchins. I love his reason for all of this:

Masato Nakatsuji, 27, of Izumisano, Osaka Prefecture, was quoted as telling police: “I wanted to see how much my computer programming skills had improved since the last time I was arrested.”
via