It doesn't matter why anyone would want to use it, that's irrelevant. But allowing the use [of anything] based on skin colour is pretty much the exact definition of discrimination based on ethnicity, ergo racism. You might not even realize it, but you're actually advocating for double standards.
Is it? I might have missed all those posts of people defending the use of the word nigger. I'll try too scroll back a few pages, maybe you're not just making it up to prove some ridiculous point.
As for your results: I wasn't aware that you were literally referring to strict forum moderation. In that case, sure, house-rules count and the forum's owner decides what can and can not be written.
I was referring to something that actually matters: general freedom of speech.
Stop being so pathetically weak. Stop blaming racism for every adversity in your life. It's fucking sad.