Also see my comment in a different thread. Not an identical scenario, but Blizzard won a court case they filed against company whose sole purpose was to make software to violate their EULA.

https://en.wikipedia.org/wiki/MDY_Industries,_LLC_v._Blizzar....

They are necessarily violating the tos to work on the tool - how else are they testing it?

You would need to prove that. And for all we know, he borrowed the account from a friend who didn't know he was using it to test the API.

To block them from their platform and press charges if they do not? The block doesn't even need to be casually connected to the API usage - if they say go away, and they choose not to, that's CFAA territory.

3rd party clients are fully legal in most countries regardless of what their TOS might say, they are not above laws.

When did anybody bring the question of law into it? Law has nothing to do with whether or not Discord will prevent you from using their services for breaching the terms of use of what is, after all, their own service.

This thread is talking about breaking the TOS, not actions from discord (unless you replied to the wrong comment), TOS violations are moot here since Discord is not above laws.

I am replying to the correct person, but your comment just now doesn't refute what I'm saying. I don't say that Discord is above the law, but that doesn't meant they don't have the ability to deny access to whomever they please when someone contravenes their TOS.

Yes, TOS are not legal documents. We all know that. That doesn't make Discord beholden to granting everybody the same access to their service. I don't know why people feel the need to bring the law into it; it was never relevant to start with, so making a point of it is unhelpful.