Google part numbers (if they aren't scratched off/lasered off/ epoxied). Once you've found the ethernet controller, you can short out the pins, or yeet it off the board.
To be fair, the article linked this idiotic one
about OpenAI's "thirsty" data centers, where they talk about water "consumption" of cooling cycles.. which are typically closed-loop systems.
Joke's on them. Their telemetry server is in another
castleVLAN.