Another user talking about being banned from Discord was supposedly involved with a server trading child pornography and then continuing to get banned by creating additional accounts which is once again against Discord's terms.
I'm not seeing a lot of examples of people truly getting banned for no reason. It's not my place to tell Discord what is and isn't abuse of their platform. They're allowed to make their own membership rules.
But please, answer my question. Is discord allowed to exclude those who they feel abuse their platform? That's kind of the key point here.