On the StackExchange English Language and Usage site, someone asked why American English doesn't use -er pejoratives like "wanker" or "nutter." I posted an answer saying that American English doesn't use those pejoratives, but it does use many others, like "cracker" or "motherfucker". I included a list taken from Wikipedia.
In one of the comments, a site moderator said
Some others: codger, greaser, hater, muckraker, poser, not to mention the “N-word”, which ends in -er.In response to that comment, someone else said
The "N" word is offensive! As are the others but, in particular, the reference to the "N" word. I am disappointed [...]. I should think a moderator would steer well clear.
Again, like with Dr. Laura, the moderator didn't use use the n-word, he merely mentioned it. But, he also used what I assume is the standard taboo avoidance term: n-word. Even this was enough to offend some commenters.
P.S. John McWhorter has a bit about the history use of the n-word and other racial slurs as in-group terms.