Part of its mission statement, as found on the OnStar Web site, is the creation of "safety, security and peace of mind for drivers and passengers with thoughtful wireless services that are always there, always ready."
As an aside, I was in the Barnes and Nobles last week, and couldn't help but skim through the Revenge of the Sith book. The part I was most interested, though, was how Palpatine actually convinced the Senate to go along with his scheme of creating the Empire, framing it in terms of peace, justice, and security. Supposedly, Lucas based this portion on Richard Nixon and on Hitler taking over the Reichstag.
There's something about these themes of "peace, justice, and security" that just targets our reptile brains, short-circuiting our thinking brains and makes it impossible to think through these issues rationally.
And here's a good quote from Tivo: