How do you know that this isn't inside job?
In my opinion if hacker steal money from exchange it is not your problem and they have to pay back whatever users lost.
I'm a FIRM believer that it is ALMOST ALWAYS an inside job when any place gets 'hacked'.
I lost a bunch when BTC-E fiasco went down, turns out it WAS BS reasons like I said from the start, not what they claimed.
As far as I know the management involved still has hits out on their heads (they walked away with a few hundred milllion in USD).