Fun is a disease, a virus if you will. And if you let Fun flourish unchecked it makes people, who aren't having Fun, angry. You see, on 4chan there is nothing worse than someone liking something that you, yourself, have no vested interest in. Worst case scenario you have two or more threads of the same cartoon which means somewhere there's a comic book company war thread or /tv/ (or /pol/) shitposting thread being pushed off the end of page 10.
Cartoons are fine and all, but when they start to interfere with /co/'s sacred charge of mass producing cross board conflict, company war shitposting and just all around aimless pathos & bickering then they have to go. Just look how little conflict there is in this thread, it's a small wonder that people haven't started complaining about these threads yet.
And god help you if your topic of choice is a cartoon with talking animals or under-aged characters, because then that automatically makes it illegal to enjoy without being a furfag or pedophile.
You kids need to realize that this board is for complaining about comic book movies and tv shows, not enjoying animation.