This question is taking a few extra steps beyond that, even.
Oh, sure, it’s much more of a flight-of-fantasy question than a realistic one. An invitation to consider the tactical benefits of bombarding galaxies with black holes accelerated to a high fraction of c, maybe X-D
But the original impetus was the curiosity about the status of intelligent aliens for a FAI mathematically proven to be friendly to humans.
Oh, sure, it’s much more of a flight-of-fantasy question than a realistic one. An invitation to consider the tactical benefits of bombarding galaxies with black holes accelerated to a high fraction of c, maybe X-D
But the original impetus was the curiosity about the status of intelligent aliens for a FAI mathematically proven to be friendly to humans.