All’s fair in love and business, if you have the right players on the team that is. Corps are owned by their shareholders and the main goal is dough. So they hire a CEO who keeps that foremost in mind and instills the same lack of ethics in the firms lackeys and underlings.
Say you weren’t fond of the shaky, shady scrimping behavior that oil giant BP engaged in that led them to cheap out in the drilling of a multi-bazillion dollar well in the Gulf of Mexico and consequently to the failure of said well and spewing spraying and spoiling crude onto those beautiful waters and beaches nearby. So you posted a comment someplace, or were vocal in your criticism of the scurrilous firm and its underhanded doings. Well now you can look forward to it getting personal.
Corporations are people too, or so a myopic legal system states. Let’s us shun em.