This has all been "hacked out" in sci-fi, where the techno VS bio ideas have been explored and quiet VS LOUD civilisations are thought through. To put things i

This has all been "hacked out" in sci-fi, where the techno VS bio ideas have been explored and quiet VS LOUD civilisations are thought through. To put things into perspective, we are still discovering VERY LOUD types of phenominon eminating from deep space, and puzzling over what they might be.And if we can miss and not understand every type of pulsar and black hole collision,stellar mergers, etc ,etc, then it is presumptuous to to speak about exo-civilisations energy signatures in any absolute terms.