Another fallacy I've noticed the game's defenders deploying frequently on the Big Purple thread: analogies with movies. "Terrible things happen in good movies, sometimes, so what's the difference if they happen in a game?"
Which is ridiculous. You're not necessarily meant to be identifying with and supporting the actions of characters in movies who do terrible things. PCs in roleplaying games are protagonists directly controlled by their players, on the other hand, and while it's entirely possible that a player can make their character do repugnant things in order to make some kind of point, I suspect it's more common for players who make their character break out the rape to do so out of wish-fulfillment, or a power trip, or simply through mucking about and not especially lending much importance to what is happening in-game (the last is, I think, probably the most common motive).
If I saw a movie where the director had a clearly identifiable self-insertion character, and said character proceeded to insert himself into unconsenting victims in a manner which can be clearly identified as being wish fulfillment or stupid messing about on the part of the director, I'd say that was a pretty damn shitty film.