The www.cars.gov website does not take over your computer. This is an alternate website that the dealers use, not the general public.
The name of the site is generic, and the public may indeed visit it in search of clunkers program info.
Most everybody will click to ‘agree to terms’....
at which point your computer and all of its information belongs to the government.
What part of this process do you not understand? Whether it was intentioned to be for car dealers or not does not change the duplicity and challenge to privacy and ownership.