Here's another good explanation of what some of the issues are: https://www.lightbluetouchpaper.org/2020/04/12/contact-tracing-in-the-real-world/ https://www.l

Here's another good explanation of what some of the issues are: https://www.lightbluetouchpaper.org/2020/04/12/contact-tracing-in-the-real-world/ https://www.lightbluetouchpaper.org/2020/04/12/contact-traci... The problem of trolling seems important to solve.