Moderators are usually trigger happy and will ban you because you said something they took the wrong way.
That's one reason I was very cautious of granting moderator status and giving the banhammer ability to moderators during the very beginning of this forum.
I even had created a "Lesser Moderator" role which had far less rights than a real moderator.
I created a post revisions system for phpBB just to keep moderators from editing out stuff. Before that, I didn't allow moderators or even admistrators to edit posts.