Also he is a public figure and a CEO you cannot expect the CEO to start ranting on random crap which could potentially poorly reflect on his company. Could be that his PR person told him not to.
Would you really expect a CEO of a billion-dollar company do put up pictures of himself getting totally wasted and drinking beer off the tits of some stripper they hired at a million dollar party? What about him posting his thoughts on Apple and his hatred of the iPad? That in itself could lead to bad blood between companies or investors, every word he writes publically must be cared for.
The only thing is... People should keep THAT in mind. Don't write everything as public. When you post it online, assume no amount of privacy settings will protect it. Hell assume that even your weird alias can be tracked down. Don't post it online if you don't want anyone you don't know or don't like to read it.