sorry to come so late to this - I've been away on family business so have only just got to read the new threads since my return.
I was so sorry to read that you have had these nasty problems,
I have had problems with having Michael Harris' name in the title before, although in this case it was a polite note from Ron and Anne to say that they thought that it was not a MH piece, I took his name out of both title and listing and all was ok, nobody else made a scene. But then that was a signed Mdina piece, not a problem, only the dating was questionable. I tend not to put any mention of Michael Harris in the title anymore as these seems to be contentious.
Otherwise, this seems to be very similar to the actions of the Clarice Cliff police
Nobody is perfect, nobody knows everything, and I do think that the self appointed police should find better things to do with themselves. I would certainly pull the entire thing, let the people settle back into their seats and turn their attention to someone else and then relist in a few weeks time, with no mention of Michael Harris in the title itself. That seems to be what attracts their attention in the first place.
Mark Hill has said that he believes the piece itself to be good, I would link to that discussion specifically in the listing, saying "read more about this unusual piece which Mark Hill believes to be Mdina"or something, ( I usually link to Mark's site as well, so people can see his experience) and then keep your description of the engraving very factual, making no claims at all, simply saying that it exists.
Duck your head down below the parapet m'dear, and let the snipers go on their way...