With Carol Thatcher thinking it's ok to call People of Afro Caribbean decent The G word, should society?

Just put up with it? Celebrity's think that it's ok to publicly slander some one for their colour, race, etc etc. Prince Harry and his grandfather is well known for his public gaffs, now Big mouth Clarkson has put his 2p worth in. Is it acceptable? or is it ok, to think this way as long as you dont get caught saying it.