Depends on the kind of whistle blowing. I know I'd have a hell of a time if I'd call the administration of my university in general 'corrupt'. I might barely prevent being fired by a quick apology and retraction. But if I'd call one specific person 'corrupt' with good evidence some others still might decide to make my life harder so next time I think twice before whistle blowing, but there would be no court case against me.

Wolfgang