I really don't think it is as simple as that unless you know more than the rest of us, GagaJo, in which case it is hardly fair to take the moral high ground. It is true that the OP is accusing an unspecified poster of betraying an unspecified confidence, which none of us would have known about otherwise, and it is not 'picking on her' to say so. That really is the language of the schoolyard.
As for the veiled threats about people needing the mind their Ps and Qs - again, that is between them and HQ, unless you are hinting at information that should be private. I am only aware of one poster who was banned and reinstated and has been responsible for the loss of valued posters. (She made a public declaration about it and has referred to it since, so I am not breaking a confidence here). If there are others, it may have been public knowledge at the time, but it isn't now, so it strikes me that you are guilty of the speculation of which you are accusing others.