4) Sullivan makes an argument that laws should be passed to stop the actions of Garfield and those like him. Assuming that there are no anti-trust issues (anti-competitive issues), does government have a legitimate role here?

While I can understand why Sullivan would be angry, I don't think government does have role in this situation. We have a free enterprise system, and you can't legislate ethics. Both sides had tried to deceive each other, but neither side had tried to deceive the people.

5) Jorgy states that a business is worth more than the price of its stock. Garfield uses an example of buggy whips to make the point that management has a responsibility to allocate corporate resources in such a way as to maximize shareholder value. and, if management fails to uphold its fiduciary responsibility in this way, then you can't blame people like him for stepping and doing what the board should have done. Garfield counters Jorgy's argument that he (Garfield) does not make anything but instead simply destroys companies and lives. He states "…I don't...

While I agree that a business can mean more than a bottom line, if the business does not make a profit than it will die. Without profit a business has no meaning.
6) What is the moral of this story? Is there a culprit here? If so, who is it?

The moral of the story is that we live in a capitalistic system and for businesses to survive they must remain competitive. There is no culprit in this story. It is nice that the company could fill another need making air-bags, but if that opportunity had not occurred than Garfield was right, it would have gone the way of buggy whip manufacturers. As Garfield said, "I'm a capitalist I'm simply following the law of free enterprise…survival of the…