I didn't know that Mike did it, and we still actually don't know (unless he admitted it), but I don't consider it a dick move at all.
Elements of Persuasion was out, and Octavarium was not officially released yet. But everyone knew that it had leaked, so someone retagged EoP and sent it out there to specifically fuck with people who were after music that they're not supposed to have. People downloaded it off of Kazaa or Napster or whatever was around then, I don't remember. They heard James' voice, they were fooled. Good times.