There are two recommended readings on the subject. One of them comes from the Inquirer and another comes from a blog. It is aptly titled "Steve 'I am SCO' Ballmer"

The 'cold-war' between Ballmer and the Open Source movement that has raged on and on and on, continues to escalate as the "Ballmer rhetoric engine" version 2.0 picks up speed.

[...]

With Ballmer's increasing aggressive tirades against anyone whom he believes is 'evil', it is becoming apparent, at least to this author, that Steve is at risk of simply becoming irrelevant, as the entire world marches towards a more open application framework, which is increasingly focused towards inter-operable web based technologies - with code and ideas flowing in many different directions.

System administrators who operate in a so-called 'mixed environment' can attest to the same feeling. They take great offence. And although the context is different, you may also enjoy the following recent quotes, brought to you by an anonymous Microsoft employee (the notorious mini microsoft).

Ballmer: "That didn't go over so well."

Flunky: "The reaction seemed about 50-50."

Ballmer: "At best."

[...]

Around Vista ship expectations and what Mr. Ballmer has said, Charles shares the following: "Seriously, Ballmer himself is responsible for setting unrealistic expectations in the first place..."

It is evident that the man has lost plenty of credibility. The company which he runs sometimes acknowledges the fact that he only increases the damage. So, the bottom line is:

Let him talk.