And if that means that Discord has to shut down... well, okay, if that's the price? An organisation that doesn't care about the impact on its host society is nothing more than a parasite or cancer and should be treated as such.
(Besides: if you're aiming at stuff like groups of kids bullying other kids into suicide or self harm - guess what: that existed in times where there was no Internet. It just wasn't widely reported, other than maybe holding a vigil for a classmate who had "passed away")
What is making Discord different from the real world? Do we ban kids from going to school because they could get bullied there?
Yes, sure, some content we decide to age-gate in real life... but hell. Our parents perused the VHS porn stash of their parents. Their parents wanked off to Playboy magazines. It has all been bullshit from the start.
