Whistleblower
In law and business, this now means an employee who snitches on bad practices by co-workers (especially the higher-ups) but who is protected from recrimination by legislative provisions like s 27 of the federal Digital Privacy Act and s 66.1 of the Competition Act, or, in the US, s 922 of Dodd-Frank.
Think Edward Snowden, but without the subsequent need to live as a fugitive.
All well and good (unless you’re Edward Snowden), but I’m weary of the word.
And it’s imprecise: in a sporting match, the whistle is blown not by a player, but by the referee …