This one's free, KSR, sir.
edit: Kardashev scale
/s if not obvious
> Exponential growth is real
It’s really not. 99% of the energy used by humanity is still sunlight used to grow crops the same it’s been for thousands of years, and crop land use hasn’t been increasing exponentially. The majority of growth has been from efficiency gains not utilizing more energy.
Our ancestors realized irrigation and selective breeding allowed for more production from the same land. Fertilizer, better breeds, insecticides, meant more yield and automation meant less labor but the underlying energy input is unchanged barring increases in land under cultivation or the mouthes of livestock.
Instead many historic curves look exponential when you ignore the underlying population growth driving the whole thing and the recent reductions in fertility.
But I have no doubt the energy gained by gifting the Kardashians escape velocity would be scientifically significant.
I've read a lot of science fiction involving macroscale engineering on such levels, but I think even the most misanthropic science fiction writers have a hard time imagining a species that can start meaningfully affecting the orbital dynamics of their solar system but are clueless about possible negative side effects. By the time you're postulating such things, all the negative side effects that may leap to your mind involve energies many, many orders of magnitude smaller than the disruptions themselves, e.g., "oh no our satellite orbits", well, divert .000000000001% (I just hit some zeros, that's not calculated carefully) of the energy to fixing the satellite orbits. You're going to anyhow.
When has that ever stopped greed?
On a more amusing note, if you're interested in a counterexample to your direct claim, which involves another catastrophe that makes the worst predictions of climate change look like human paradise, I would recommend to you "The Nitrogen Fix" by Hal Clement. I won't spoil what the catastrophe is in case you might be interested in reading it, but Google will spoil it readily if you prefer.
In the interest of avoiding spoilers, I will merely advise anyone interested in a story with similar themes and content to read Signal to Noise and its sequel A Signal Shattered by Eric S. Nylund. You may know him from his work on the Halo franchise or other popular games. I don’t really know his other work, since I first discovered him via his original works.