..well, the blood too. Or that people actually die. Might shock people or something. Specially when it's targeted at young teens, see.. Who never have obsessions with death at all.
I mean, people brought up several perfect examples of how this works - networks pick up something that isn't supposed to be very deep in the first place. And then they actually censor out anything that could provoke people very consciously. In the same way, any of the references to politics or indoctrination in Animaniacs, for example, is buried down somewhere in between a fart and a honking clown- nose ("Yes, Pinky! Tonight we shall take over the world!"). It never fails, and it's by design. Any series coming out in animation that flirts with character development is, essentially, something along the lines of: "oh, dear, my (very non- specific but allmighty and good)god, I am so hurt by seeing this big animal suffer, and now I must help it. And it will become my friend, even though I wanted to make it my dinner".
Early episodes of Dexter's Laboratory, though, had several different formats, lots of experimentation with plot- devices, different rules every show - fuzzy perspectives, indirect story- telling, inner soul- life, entire episodes that take place seen through the eyes of one of the characters. That's at least experimentation with the format that is very interesting.
Or the Superman vs. Batman movie - plays like a good episode of The Dark Knight, and has enough elements to fill a perfectly ordinary feature film. So there's one example of plot- development as well. True, Batman in general escapes scrutiny because it's seen as just a super- hero thing (and no one talks about the drug- addicted DC version anyway), so it's cool, apparently.. I guess if they knew what Mark Hamill is brainwashing the youth with now, after he left the Luke Skywalker character behind..

But yes, the themes in Batman are there. It's possible to watch The Dark Knight and come away with something else than ritalin- fluffies behind the eyes.
Then it's Aeon Flux - this pushes taboos, and explores human enterprise in a merciless way that doesn't brand anything in good and evil, but in a choice and the reasoning for it. Clearly targeted at 16-18 something and up as well. And, I don't know, carried Liquid Television single- handedly for as long as the series existed..
But you know - those are the only examples I can think of of animation that happens to have been sponsored by western money, intended for a western audience - that wasn't piled into the heap with comedy and children's television - and it's only just. Before that, you have to go all the way back to Disney's Fantasia, or something.