I have used many a racial slurs and never been banned.
If I can add my two cents, I think they should be allowed as it moderation of language is, in essence, moderation of thought. This place is not for the faint of heart anyway. If you can't handle being called something on the internet, you probably aren't blackpilled and are just a reddit-tier censorship pussy.
When they shouldn't be allowed is when they are used in a targeted manner, such as "hey @usernamehere, you're a slurhere and you should kill yourself". I don't think it's wrong to say that, but it's low effort and derails threads, so it shouldn't be allowed.
I like that I can be myself on this forum.