And don't forget Ali Project's lyrics quite... "violent" for kids... Nori talking about Shinku as a "Dutch Wife" (kids can google, now), and other dark and mature themes that Rozen Maiden deals with (euthanasia with Megu's case).
And it seems that Geneon choose the "16+" to rate RM's audience.
RM is truly NOT a kid anime... I have a 10 years old goddaughter who wanted to know more about this show because she liked the "santa-desu" I drawn for her. And I was quite embarassed when it came to explain her why I didn't want her to watch it.
