John Galliano's Racist Rant
Normally, when a guy who looks like a drunken pirate starts hurling racial slurs at you, it's the kind of thing you brush off. Until you look closer and realize that not only is it not a pirate, it's John Galliano. That's when you start recording video with your phone. When Galliano went on a rant about how much he loves Hitler and hates Jews in a Paris bistro late one night, it cost him his post at Dior and whatever little bit of dignity he had left.