A few years ago, social media accounts tracking celebrities’ private jets dominated the internet. He also tracked the private jets of Taylor Swift, Mark Zuckerberg and other high-profile figures. In 2016, Leonardo DiCaprio was criticized for flying 8,000 miles by private jet to accept a “green award.” Musk has called jet tracking a “physical safety violation” and threatened legal action against Sweeney, although no lawsuit materialized. To avoid the hassle completely, Bernard Arnault, chairman of luxury-goods conglomerate LVMH, sold his company’s private jet and opted for chartering.