For someone who despises the advertising industry, Elon Musk has a way with viral slogans. At a New York Times event on November 29th the world’s richest man was asked how he felt about firms pulling ads from X, the social network he bought last year when it was known as Twitter. “If somebody’s going to try to blackmail me,” he replied, “go fuck yourself.” The “GFY” approach, as he dubbed it, may come naturally to…