Icon:  Indeed, the whole PC issue is troublesome.  Indeed, sometimes folks go "overboard" and, on the flip-side, sometimes individuals use it to trivialize concern over actions and comments.

On day, in my presence at the home of a friend, a buddy of his of a started a critique of President Obama with "that stupid N#$%$" I stopped him and said "We have a bi-racial biological Grandson and two adopted African American grandchildren.  If I accept your racist language I'm being a traitor to them...I won't do that.  If you wish to continue with a racist rant I can't stop you, but let me know and I will leave."  He started with the all-too-typical "well, I'm not a racist, but..." line.  I told my friend I'd see him later and left.  

Some on this site (Don R. comes to mine) would say I need to "grow some skin."  No, I think we all need to refuse to accept insulting, degrading, disrespectful comments from others.  That trivializing using PC is often just a weak defense for offensive behavior