"Whistleblowing" requires something illegal to have occurred. It doesn't appear any of the disclosures being made about Facebook allege anything illegal. They are just disparaging insider information. Anyone who has worked in tech for any amount of time has signed an NDA. They are not nefarious.
> one who reveals something covert or who informs against another
especially : an employee who brings wrongdoing by an employer or by other employees to the attention of a government or law enforcement agency
Wikipedia further asserts:
> Whistleblowing is the activity of a person, often an employee, revealing information about activity within a private or public organization that is deemed wrongful – whether it be illegal, immoral, illicit, unsafe, unethical, or fraudulent
Arguably, nothing the NSA was doing was illegal. Was Snowden not a whistleblower?
> Anyone who has worked in tech for any amount of time has signed an NDA. They are not nefarious.
Non-Disclosure agreements to protect a company's legitimate business and trade secrets aren't nefarious.
But I'd argue that Non-Disparagement agreements or non-disparagement clauses that block disclosure of inappropriate personal behavior is, in fact, nefarious.
"Whistleblowing" does refer to disclosing morally bankrupt behavior that isn't technically illegal, and NDAs are nefarious if they cover anything other than trade secrets.