What I was trying to say is that your hypothetical does a good job of showing why blame is not zero sum. Obviously in either case the criminal receives the same blame, but I think it is fairly clear that the victim who took drastic measures to reduce risk is less to blame than the one who did not.
The important thing to remember is that the blame of the victim, while present, has no relation to the blame of the criminal and should never be relevant in, for example, a criminal trial for the criminal. I really feel like I can't emphasis that enough.