I don't know the perfect answer to the question "At what point does a company need to be broken up, to protect the liberty of our citizens?", but I would wager

I don't know the perfect answer to the question "At what point does a company need to be broken up, to protect the liberty of our citizens?", but I would wager it's somewhere on the near side of "when the mere suggestion that the company could shut down for 24 hours would cause unthinkable chaos".