So they are spinning it as a user's fault? Not the fault of Netsential for allowing malicious content to be a problem...
That's what whistleblowing is all about though; purposefully breaking the law or a contract (like an NDA) to expose shit. Some countries will protect whistleblowers, others have to flee and seek asylum abroad.
So don't deny whether or not law and/or contract was broken, instead focus on whether the action was justified. Yes the system was broken and open for exploitation, but the attack was not accidental: they intentionally uploaded a malicious payload, intentionally extracted data, and intentionally uploaded it to the internets.