That's fine, but what happens when you end up on the radar of some radical group, for whatever reason, and innumerable people start showing up with the singular intent of disrupting things and causing shit? What if it's multiple groups, some Twitter based, some 4chan, some Reddit, all set out to get you? What tools do you have to protect against that?

Discord needs ways of mitigating this, of going into lockdown mode, to deal with exceptional situations. As their platform grows in scale the liability increases exponentially. Without counter-measures they expose themselves and their users to ever increasing risk.

GitHub has had to make a few radical alterations in their core features to deal with rampant, malicious abuse. Discord will have to do the same or they will fail.