iPad hacker arrested for not hacking the iPad

I recently argued 'Why Goatse was right to disclose iPad data leak' after it came to light that the FBI had started an investigation into the hacker group following the responsible disclosure of an iPad data leak caused by poor AT&T security measures. I said "The security researchers which discovered the vulnerability ensured that AT&T were not only informed, but that it had also closed the hole down, before going public with the news. So why are they, and not the dumbass security folk at AT&T responsible for not securing that data in the first place, the ones under investigation by the FBI?" at the time, and now it seems an arrest has been made.