Not going to happen. That amount of overhead would be the end of volunteer moderators.
No way. The Mod Squad would love it. I know you think it'd give users one more thing to argue about, but it won't. It will get more users to be on the same page as the mods. It will actually pre-empt more arguments if they can go to the case history and see with their own eyes that they're being treated the same as anyone else under those circumstances, and the mods would still be free to create a new precedent whenever the situation called for it. Also, it will discourage the "rules lawyers" from thinking they can find loopholes, because they'll see with their own eyes the mods' broad discretionary authority.
As a side note, it has the added appeal of being deeply rooted in medieval common law, which we all can appreciate.
