I’m sorry, did I miss something in the story? What kind of crime did the guy commit, besides being an idiot? He could see them from his window, it’s not like he came to host’s property and peeked through their window. Neither was he taking photos/videos, no? So although the guy did behave like a jerk, there is absolutely nothing legally enforceable against him in this situation. I mean, we could pretend that we live in a world in which there are no tacky, sleezy people whistling or ogling women. But we don’t. In the light of these facts, I don’t think it is victim blaming to say that girls should be using their common sense and pull on the curtains next time. I can understand it is unpleasant, but this kind of behaviour isn’t and shouldn’t be punishable by law. In the best case they should shame him by shouting at him and in general displaying that this behaviour is not acceptable. That’s something we can all do as society.