This only applies to dealers, not to consumers, and the wording has since been changed after this hit the internet.
According to the Electronic Frontier Foundation:
Quote
Clicking "continue" on a poorly worded Terms of Service on a government site will not give the government the ability to "tap into your system ... any time they want." The seizure of the personal and private information stored on your computer through a one-sided click-through terms of service is not "conscionable" as lawyers say, and would not be enforceable even if the cars.gov website was capable of doing it, which we seriously doubt. Moreover, the law has long forbidden the government from requiring you to give up unrelated constitutional rights as a condition of receiving discretionary government benefits like participation in the Cars for Clunkers program.
(Emphasis mine)
Thank you
Snopes.com!
Furthermore, examination of the underlying source code of the website shows that the most advanced bit of coding therein is the use of the jQuery javascript library... nothing there that could take control of a computer or bypass browser security, or access anything on your hard drive.
It's nice to see the guv'ment using open-source libraries!

Open Source FTW baby!!
This post has been edited by Amazing Andrew: 10 August 2009 - 01:50 AM