Regardless even if billion year old civilizations do exist, as posted above, there may well be hard physical limits on expansion due c etc. And just listening for radio evidence is unlikely, both due to distance, and the fact that out own radio window (and any other species) is likely to be short. already more and more of our radio transmissions are low power and directed. This will only continue, reducing our emissions, Listening for any leakage from a great distance is akin to trying to smell a fart in a hurricane.
Now, kindly pay your taxes, drink a case of beast and watch the football game. Thank you!
c) not particularly enamored with government spending on principle,
Wrong. They give lip service to it, but pork projects abound with th GOP. Especially if it feeds spending/defense etc in their home state.
The only way that will change is a killer app that requires more (which I do not see). For workstations and scientific data the march is great, but it has moved beyond consumer needs.
To say whatever happens is God's will and we have to accept, not change is either willful ignorance, abject laziness, or masking some ulterior motive (IE greed and power).
And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth. Genesis 1:28 KJV
By their nature (unless willingly installed by the carrier), a stingray would be spoofing its identity and therefore slightly easier to detect. Combined with a crowdsourced map to create a basic whitelist, you could do quite a bit I wager.