It's important to understand here that the judgment was not vacated on grounds that had anything to do with the crime charged -- the Court didn't conclude that he wasn't guilty. Instead, it was vacated for lack of venue. In other words, he got off on a technicality.
We also note that in order to be guilty of accessing “without authorization, or in excess of authorization” under New Jersey law, the Government needed to prove that Auernheimer or Spitler circumvented a code- or password-based barrier to access.