I certainly agree it is interesting to contemplate.
I note, with skepticism, that we are always evaluating potential alien technology through the prism of our immediate technological attainments. For example, in the late 19th-early 20th centuries when astronomers thought they picked up intelligent design in lines on Mars, they were interpreted as "irrigation canals" -- not coincidentally what was happening in many places on earth. I can remember in my boyhood, in the 1960s and 1970s, inferences drawn about the potential to detect nuclear energy use or radio wave dispersal from nearby stars. Now, when there is some possible structure around a distant star, its potentially a solar panel array -- right out of the Global Warming playbook! (Wouldn't it suck to discover some vast, complex alien civilization was using coal in gigantic quantities, mined in their version of Appalachia? How Retrograde!)
That's not a political comment on my part, its an observation about how totally limited our human power to imagine anything outside the context of our world really is.