Whistleblower concerns are totally legit, but that assumes the whistleblower follows common-sense normal procedures (e.g., telling the event organizers in private, or even calling their boss). The learning point here is about the manner in which the alleged harassment was "reported" -- trumpeted to the entire world via social media with photos attached.
I completely agree, and we as a society need to learn how to live in a world where a single tweet by an semi-influential figure can cause such a shit storm. How liable are people for actions resulting from a tweet? If someone famous snaps a photo of you, calls you a pedofile, and throws it on Twitter, what are the consequences?
> If someone famous snaps a photo of you, calls you a pedofile, and throws it on Twitter, what are the consequences?
A published false statement that damages someone's reputation? That's libel. Whatever harm is done as a result of the malicious tweet would be repaid to you as damages in court.