There are probably hundreds, maybe thousands, of people in movies and on TV who have used slurs in private. Maybe we should secretly tape them to smoke them out. Even though they have never done anything in public to indicate hostility to any racial group, the fact that they might let loose with a slur in private during a period of anger should be enough to alarm all of us. To hell with privacy, fighting imaginary bigotry is more important!
Oh, and apologizing won't be enough. They all must be fired before we can be satisfied.
At point in time 90% of the people are walking around with a portable recording device in their pocket. And 100% of the people should be aware that they can be recored at anytime talking to anyone.