Jack Sweeney, the Florida college student who's known for tracking Elon Musk's private jet, has also been tracking Taylor Swift. On Feb. 6, Sweeney confirmed to CNN that he has received a cease-and-desist letter from Swift. He is accused of "stalking and harassing behavior, including consistently publishing real-time and precise information about our client's location and future whereabouts to the public on social media," the letter states. According to Swift's attorneys, Sweeney's actions pose an "imminent threat to the safety and wellbeing" of the singer.