Oblivion rated 17+/Mature Only because it can be hacked
I mean, come on. How the hell can a game get taken off of the store shelves because some MOD maker found a way to unlock hidden art assets that are otherwise inaccessible to the game?
Are we so interested in policing games, that if they have the potential of being nudified we need to change their rating?
If I found my son (he's 1 right now) nudifying a game of his, I would have a talk about objectification and natural curiosity, not necessarily in that order. But I wouldn't expect the game to come with a mature rating because, if he sat there and downloaded some hacks/mods, my son could alter the game.