Acceptable: "Niggaz be trippin"

Not acceptable: "Shut the fudgesicle up you polack son of a biscuit"

If you have a problem with someone saying something, let them know that you are not cool with it.

If you say it and someone asks you to stop, please do so.

If the perpetrator becomes belligerent, a mute would be in order.

This is just my opinion of course. We shouldn't be so technical with these things, and it should only be illegal if it causes a problem, and should be handled with maturity as with any situation.