> They have to fulfill their fiduciary responsibilities to shareholders, or at least appear to do so... Actually they could completely ignore their shareholder

> They have to fulfill their fiduciary responsibilities to shareholders, or at least appear to do so... Actually they could completely ignore their shareholders from this point forward and absolutely nothing would happen to Facebook the company. They have their IPO money in their pockets and the daily ebb-and-flow of Facebook share-trading provides no benefit to them other than reputation-enhancement should they wish to go to the markets again in the future.