i agree jack could have been more diplomatic, oddly he was never a dickhead with me, on the other hand he did not suffer fools gladly,
if he presented copy/pasted material as his own that's dishonest,
on the other hand i think anybody making technical posts should post links to respected reference material.
He would just never credit anyone with anything he posted nor would he actually claim it was his own but gave the impression that it was. He did however take offense to someone re-quoting him and giving credit to the proper source.