I have to agree with you. I don't want to see that, and I'd hate for others to see it, too.
Okay, I went and looked at the picture of the guy, and at least he's not exposing himself--still not appropriate for young girls, but not as bad as I had imagined. I never found the woman wearing the male organs, so no comment about that.
It think it would be appropriate to notify the Ravelry creators and express your concern--especially in light of the fact that many young girls regularly use Ravelry.