To add to my previous post, another ironic fact is the 'whistle-blowing' itself is what caused the real harm - not the private jokes. Had nothing been said, and had it been left alone, the university would never have been implicated. Some things are best left in private, which itself is relevant to the context of things like this. Imagine trying to explain every dirty, edgy, offensive thing you've said while under the impression it was private.