This is what happens when Blizzard constantly allows hackers to get away with this stuff and never takes any legal action over it.
Then again who knows, maybe they're hacking their own game for publicity.
---------- Post added 2012-10-07 at 07:19 PM ----------
Edit: Unlisted youtube video.
Posted on owncore. Seems like it's the same people who hacked the game around a month ago or so.