Earlier quoted context omitted.
Slurs are part of discourse. Slurs are considered a problem because they're offensive . Banning them is the first step on the road to banning offensive content. Who arbitrates what is offensive? Sure, we can agree on "The N-Word" , but how about Idiot's Guide to Web Tools?
Can you not tell the difference between "The Idiot's Guide ..." and "The R---rd's Guide ..."? "Idiot" is not a derogatory slur.
And note what I said in a previous commend about the elder meaning of 'idiot.' Pretty much means the same thing as 'retard' but people don't think of it that way anymore. You're taking such a traditional mindset about this, kind of "just what your parents told you."