I think no matter what the circumstance of rape, a woman is still raped - that is wrong and it's not her fault. However, that doesn't mean to say women should dance around naked at 3am - our society is not going to change over night, and really walking home alone at night in a dangeous area (this applies to anyone) is still Dangerous.
Of course women shouldn't be made to feel it's their fault, but taking unecessary risks doesn't help - yes, it's the principle that people should feel safe in their environment, but let's face it that's not going to happen, or if it does it's not going to happen soon.