Roger:
The quote of Joe's that you use to justify your claims appears to be a "One off" and certainly fails to say what you seem to believe it says.

Shambles can say whatever he likes about me, and it's very unlikely that his messages will be deleted - despite all his complaints about deletions, the only Shambles messages that get deleted are the duplicate ones he posts in two or three locations. I may not like what he has to say and I may be convinced that he's an idiot and a troll - but at least he has the courage to use his own identity when he speaks, and I respect that.

So Joe has said (a) "I may be convinced that he's an idiot and a troll". Had Joe said (b)"I am convinced Shambles is an idiot" that would have been a little more serious. Had he said (c) "Shambles is an idiot" that would have been stronger still.
However, what he has said is that he "may be convinced". Are you really trying to do all that you can to convince him?

Statement (a)suggests an openness to persuasion
Statement (b)states a personal opinion
Statement (c)could be considered offensive

Nigel (not a protector of the 'Witchfinder' as I don't believe he needs it)