The principple "Don't shoot the messenger" applies to real-life messengers.
It does not apply to anonymous 'messengers' on the Internet who spread stories that can't be verified, and who themselves are of unknown credibility/origins, and who could have undisclosed biases/prejudices against the person they are criticizing.
It does not apply to anonymous 'messengers' on the Internet who spread stories that can't be verified, and who themselves are of unknown credibility/origins, and who could have undisclosed biases/prejudices against the person they are criticizing.