Unless the dark forest [0] theory is correct and the Dyson Sphere is designed to look to all intents and purposes like a dust cloud.. (not that it helps us with

Unless the dark forest [0] theory is correct and the Dyson Sphere is designed to look to all intents and purposes like a dust cloud.. (not that it helps us with our discovering). 0: https://en.wikipedia.org/wiki/The_Dark_Forest https://en.wikipedia.org/wiki/The_Dark_Forest