On Tuesday, a small plane could be seen flying over downtown Austin with a banner trailing behind. This wasn’t a proposal or a game-day advertisement. The messenger was out to make a statement: “Save Tesla, Fire Musk.”For four hours, the plane circled the city, where the world’s richest man keeps a 14,400-square-foot compound designed for some of his thirteen living children and their mothers and where Tesla, his electric-car enterprise, is headquartered. Stunned Austinites took a moment to crane their necks and marvel at the aerial communiqué. “Nearly broke in traffic on Lavaca to take a pic,” one Redditor wrote in response to a photo of the banner posted in the Austin subreddit. “Loved seeing this; thank you!” It was no coincidence that this anti-Musk sentiment…