The Angry Astronaut outlines how Sagittarius A, the Milky Way’s supermassive black hole, could generate a blazar powerful enough to sterilize vast regions of the galaxy, including Earth, and explores whether advanced civilizations might already be managing this threat. Drawing on recent observations of a microblazar, Fermi bubbles, an antimatter fountain, and an anomalous millisecond pulsar near the galactic core, he frames these phenomena as potential evidence of Kardashev Type III engineering and a possible explanation for UAP-related questions about non-human intelligence and galactic-scale infrastructure.