Those aren't Dyson spheres, they're HotDOGs

If there really are advanced alien civilizations out there, you'd think they'd be easy to find. A truly powerful alien race would stride like gods among the cosmos, creating star-sized or galaxy-sized feats of engineering. So rather than analyzing exoplanet spectra or listening for faint radio messages, why not look for the remnants of celestial builds, something too large and unusual to occur naturally?