It is there in Soul Eater, but it shouldn't be a problem without a reason for it to be a problem, I mean, from what I looked up at least...

... I don't think forcing everyone's characters to be insane is appealing at all. There's plenty of other things to do in Soul Eater's setting. I joined because of the people who can turn into weapons that get wielded by other people to fight evil, not because of insanity.