I am not making a case for either side, but would like to point out:
Some people are allergic to nuts. I'm not.
Some people are allergic to poison ivy. I'm not.
At 14 years of age, I was not allergic to bees. After turning 30, I was/am. I now no longer go to the hospital when stung. I do not carry an epipen. The effects seem to be getting less and less every time. My understanding is it is supposed to get worse.
My point is, different strokes for different folks.
"A corporation is a separate legal entity that has been incorporated either directly through legislation or through a registration process established by law. Incorporated entities have legal rights and liabilities that are distinct from their employees and shareholders, and may conduct business as either a profit-seeking business or not-for-profit business." http://en.wikipedia.org/wiki/Corporation
You needed it defined as a "personhood" to understand what is meant here? It protects the shareholders. You cannot sue them. You sue the corporation and the shareholders assets are safe, they still have a home with a full six-car garage. Employees can say they were just doing their job, following orders. These people aren't responsible, the corporation did it.
P.S. Separate legal entity did not come about after "corporate personhood," it was the original intent. Did someone take it out of context so the courts had to supply new definitions and clarity?