Ok, good. So there's a limit to how badly you're willing to abuse the principles of rule of law. False accusations of murder against an individual make you uncomfortable, but you're still comfortable with false accusations of monopoly against a corporation if it "breaks up the hegemonic power" the "megacorps wield".
It's sounding a little Mr. Robot for my taste, but ok.
I don't think there's a very bright line between governments that enlist those two false accusations. I have real problems with the Facebook behaviors you're describing, but misapplying anti-trust law isn't going to solve it. And if your implication is that Facebook is so powerful that we can't get privacy legislation enforced, why do you think we'll get anti-trust legislation enforced?
Twisting the justice system to selectively break up companies you don't like for whatever reason, doesn't actually address the reason you don't like them, doesn't prevent that bad behavior from happening elsewhere, and is begging for further corrupt application of law.