Is there such a thing as being too PC??

There have been many news stories that have made me question the fine line between freedom of speech and being politically correct. These include descriptions of Jeremy Lin as "chink in armor", having a picture of him coming out of a fortune cookie, Roland Martin tweeting about smacking guys at Super Bowl parties that liked David Beckham's TV commercial, Karl Lagerfeld saying Adele was "a little too fat" and Kirk Cameron saying being gay was "unnatural and detrimental to society".
I think Bill Maher had the right idea to name his show "Politically Incorrect". It warns viewers in advance if you can't handle his freedom of speech, don't watch. The same goes for tuning into any known shock jock radio show. No one can act surprised if they tune into Howard Stern and hear him talking about sex or listening to a conservative shock jock that illustrates the "absurd with absurdity". Unfortunately that is not the case if someone is watching mainstream television, reading the newspaper or following someone on twitter.
As a black woman I have been victim to many racial slurs and hateful acts as a child due to my skin color. Therefore, I am very sensitive to the matter. I do believe no one should say things that are meant to be purposefully cruel. But how about people who say things without the intention of being racist? Yes they should be educated but should we rush to judgement that they are racist? Are there comments that in the spur of moment are meant to just be funny and should be overlooked vs getting an immediate suspension from your job? IE Roland Martin's comment. I do agree that if you are a journalist or TV personality you have to always choose your words more carefully but he did not make his comments on CNN. He did so on his personal twitter account.
As for freedom of speech-doesn't everyone have a right to their opinions along with the right to express them? Is there anyone who looked at Adele and didn't think as Karl Lagerfeld did? Granted I do not see a reason to have been vocal about her weight since she is not a personal trainer. She is a singer with enormous talent which Mr.Lagerfeld also mentioned. But did his comments really warrant a call to boycott Chanel? And I can not help feeling bad for Kirk Cameron. Even though I do not agree with him, he has the right to express himself just as the supporters of gay rights do.
In the end, I think we could all stand to loosen up a bit and laugh more. For those that are known to have racist views and use inappropriate and derogatory terms on a regular basis, then I say "off with their heads". (Kidding).
Thoughts?