It happens all to seldom, for reasons I understand well. Oil companies and Wal-Mart and other vilified private entities that are the object of populist and cynical political attacks very seldom fight back. The reason is not because they are in the wrong, but because the government has the power to gut them like a fish in a myriad of ways, and are populated by petty little thugs who love to dish it out but can seldom take any criticism.
That is why its great to see Koch Industries telling demagogues in the Democratic Party to take a hike. For some bizarre reason, perhaps because the Left saw how much fun the Right had vilifying George Soros for everything, the Koch brothers are not the source of all imaginable plots and schemes.