After dinner thoughts
What about the planets? Put up big fusion generators?
Probably. But you'd start by taking apart stars without planets. You don't want bystanders if there's a learning experience.
It might also be a good method to locate advanced alien life. The human race broadcast large amounts of energy for less than two hundred years. An eye blink if you're trying to detect it.
So if you see part of the galaxy where the stars are going out, that would be a good place to go looking.
For you, maybe. Myself, I'd consider it a big “Keep away” sign.