Why do you think people think anime is childish? Can you give any examples of non-childish anime?

From the many people I've talk to, foe and friend alike, some of them have something in common. While anime is called animation or japanese cartoon to some, they consider it a "cartoon." That gives them the misconception that all "anime" is childish and has simple kiddy plots, wouldn't you agree?

Think for a bit. Why do you think people think anime is childish? Can you name any anime series that isn't meant for children?

I'll give a few examples. Elfen Lied, Gantz, Ghost In The Shell, School Days, Mirai Nikki, SHIMONETA: A Boring World Where the Concept of Dirty Jokes Doesn't Exist, Prision School, etc. The list can go on and on.