This was almost certainly done by a lawyer working on his behalf. This strikes me as a technicality of paperwork that is being seized upon by the media as a way to portray Musk in the worst possible light.
> I wouldn't want somebody like him on my board
In this hypothetical, what is your role (i.e. fellow shareholder, CEO, employee)? I ask because shareholders (aka the owners of the company) choose the board. Musk owns nearly 1/10th of the company, and is now the largest shareholder, institutional or individual, by a good margin. In other words, whatever your hypothetical role, you wouldn't have much of a choice.
Setting the mechanics of boards aside, there is strong case for him being the most successful business person alive. He is right up there with Bezos, Gates, and Zuckerberg. Shareholders should be cheering this on. And there is some evidence, in the form of the stock price, that they are.