It depends what the purpose of the Discord channel is. Is it for open and frank discussion, or for MS drones to discuss Copilot development. It's a cliche, but banning certain words smacks of 1984-style censorship.
So... 4chan? Why would you possibly want that in this context?
Although, you're posting on HN so it's probably fair to assume that "open and frank discussion" isn't a very high priority for you.