"Now what if, making the argument that women ought to be careful about any behaviour that might encourage rape also contributed to rape-culture?"

I'm not exactly sure what you're saying here, so I want some clarification before I respond. Are you asking whether women avoiding behaviour that would increase the chances of getting raped would support the tendency of some people to blame the victims of being raped for their misfortune? I'm not exactly certain about what Rape culture is.