I think this is all being over-analyzed a little bit. Given everything Zath said, I'd say he was just proving his point more than anything. In a game of tricks and deceit, it's a lot better to be long-winded and get your point across than not say enough and just sound like a fool.
Also, Zath, as a character tends to be one of those friendly types who says that kind of thing (you guys seriously should pay attention to old threads. That's twice now you've missed something that could help you).
At this point in the game, since we don't have much evidence supporting who might and might not be a griefer, it's often better to just get rid of the people who don't make sense/use false logic and hope you nail one.
That being said, I'm going to go ahead and change my nomination. Zath, even if he wasn't that friendly, could just be happy he got a power role and not blue/white. You also said he seems sketchy without proving it/providing any evidence. That to me seems more suspicious than what creeper had to say, as that could have just been an oversight. Unless you manage to prove what you said, my nomination stands.
*UNNOMINATE creeperTNTman198
*NOMINATE halex44