If the fucking system worked like it's supposed to, people could put anything anywhere. Blaming the victim for a broken system is not logical.
It is if the victim, exercising a reasonable amount of care, would have known the system was broken. Now, what is reasonable is up for debate. I think everyone agrees if you ignore the "Beware of the Leopard" sign that everyone agrees you don't get to complain when you don't get a super-awesome adventure (possibly also mauled by a leopard). And I think if the breaks in your Prius go bad, then no one would think you could have predicted that (unless you are the Woz; because he did and told Toyota...)
I would say that it is perfectly reasonable to blame the victim for not realizing that nothing you put on the internet can ever hope to be private. If you are leader of a country, you should expect other countries to tap your phones. If you are a celebrity who makes a lot of money off your sexiness, you should expect people will want nude pictures of you.
You may disagree. And it is distasteful to blame the victim. But there is some point, which different people can have a discussion about, when it is starts becoming their fault.