I disagree. If your going to post like the OP did (to the public 1st, then the site owner only after he urges you several times), name the names & show the evidence.
You even said it yourself. What's the purpose of the post?
The purpose of the post seems to have been to draw attention to the issue, clearly. In that, it succeeded.
Given the official response, I'm not convinced a 'public hearing' would have been all that helpful, and that's OK. Not every issue of public concern needs to be hashed out in public. Sometimes, "being an ally" simply means letting folks deal with an issue on their own terms, even if those terms are not the same terms you would use in dealing with the issue.
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Pauper