You are foolish, stupid and uninformed. The Justice Department has no interest in who consumers chose to reward with their hard-earned money. It harkens only to the call of those producers who fail to satisfy consumers, in order to demonstrate its political power over the free market. The tools it has been granted by politically interested legislators have nothing to do with fraud, misrepresentation, or coercion in the marketplace. Their power is dictated by the totally arbitrary nature of the anti-trust law.
Absolute power depends absolutely on arbitrary law.
Prosecutors have made it clear that they will pile on any accusation they can imagine to exercise their arbitrary power. And they will succeed, because the law is sufficiently vague to preclude compliance and ensure conviction. In essence, the law is designed to punish you, the consumer, for making good, wise and profitable choices. Since the laws can't directly punish such selfish customers, it punishes the companies that pander to your whims. Decades ago, the nature of monopolies was fairly evident.