[benj111]

"How is it supposed to know that when person A says something and when person B says the exact same words....."

I was about to argue against this but then realised its worse than you suggest.

If I as a white person used the N word to describe a black person I would be labelled a racist, whereas a black person can say it all day long. But even if I black up and say it, its even worse. But then with gender the rules are almost reversed, I can declare myself a woman and expect that to be somewhat respected.

And on the internet no one knows you're a dog, or a transvestite in black face.