*nods* I left for much the same reason. Basically, I told someone to leave me alone, or I'd tell them exactly what I think of them - I would not 'hold back'. Note that this did not actually occur, I was simply tired of this person needling me endlessly even when I wanted nothing to do with them.
The Grand User then sent me a warning, saying I needed to stop that; I informed him that, if the other user stopped bugging me, that would be that; if they did, I would tear into them. If this was unacceptable, I said, then TGU should ban me once I broke the rule. Again, I had not actually violated the rules yet (and whether what I would have said would violate the rules or not wasn't even firmly established).
So, TGU simply banned me from the debate hall. I insisted it should be all or nothing; that either he should ban me entirely from the forum, or he should lift the ban on the debate hall and let things proceed as they would. He refused. So, at that point, I spam-posted "TGU is a filthy hypocrite" all over the forum to force his hand.
I've since grown more... patient, in handling double-dealing moderators.
Anyway, good to see ya you crazy canuck! =p