If you think the motives of whistleblowers are as pure as the driven snow, we'll just have to agree to disagree. #2 covers their actions, but not all whistleblowers are related to Mother Teresa.
You're making a strawman argument. I'm not arguing "all whistleblowers are good people," I'm citing the definition of whisteblowing is "a person who informs on a person or organization engaged in an illicit activity."
Reporting a CEO embezzling is whistleblowing. Announcing apple is working on a new gizmo is not. Don't conflate them.
You're conflating leakers and gossipers as bad. If they're operating under #2 in my list, their motives wouldn't be considered bad, though perhaps misguided.
I think your definition is of a whistleblower is too narrow, and I prefer the fuller definition from wikipedia:
"A whistleblower (also written as whistle-blower or whistle blower)[1] is a person who exposes any kind of information or activity that is deemed illegal, unethical, or not correct within an organization that is either private or public."
"not correct within an organization" clearly applies to the #2 in my list.
