This will be an interesting wrinkle for US college athletics. Coaches defecting to another university after secret negotiations has become very common. Watching the flights of university owned aircraft and those of prominent boosters has become a way of detecting that such negotiations might be taking place. While public universities would have a difficult time justifying paying to hide their flight data, private universities and boosters have both the means and motive to do so. A source like ADS-B Exchange neutralizes this tactic.