thats what i was going to say.
aside from that, people worrying about sociopath behavior from cartoons, i grew up on a lot of violence, i.e. bugs bunny, the simpsons, etc and i don't think i'm the least bit interested in mass murder.
this show would probably be great for adult swim. 3 year olds? chances are no.
there isn't a whole lot wrong with censorship either, as long as it's not censoring the wrong things, like morals and etc. which this show might have had at the end.
i dont know if anyone saw the dark crystal, but when i was a kid, that was f-ing scaaaary.
the only issue with violent tv is if it's not well balanced with core values and morals the kids are taught. most children, if coming from a loving, open home, can watch violent cartoons and think nothing of it, none the less, i think there are definitely obvious age limits to everything.