Erik,
I disagree with your evaluation of both Clutch and Plautus.
I had a long e-mail dialogue with Clutch, plus a phone conversation. He told me plainly that he did not accept the NPOV policy and would therefore leave voluntarily. He made one more post to this mailing list, and I chided him, "Why post here if you don't support the goals of the project?" And that was the end of it. I think it was more of a mutual "we agree to disagree" kind of thing than an actual ban -- unlike Helga.
In Plautus's case, he has shown sufficient willingness to dialogue with me to merit my continued Mediation efforts. I must chide you for calling him "mentally unbalanced" and "delusional", for two reasons: (a) you have not show me that you have psychiatric credentials, and (b) I don't think a psychiatrist can diagnose someone merely by reading their Internet posts (both A and B would have to be true, to justify your "diagnosis"). Please give me more time to teach Plautus our ways: the way of NPOV and the way of courtesy.
Uncle Ed