While I do have a problem with seatbelt laws that deal with the person/driver, and the speed laws, which should be exclusively a states' rights issue, all of the other aspects you mention deal with the safety factor of a vehicle. How are they bad?
I know it's your car, billbears, but I can only see your side if you were singled out, which is not the case.
Because the market, and not the government, should demand they be installed. In any market there comes a time the demand would force the manufacturers to install it. But this demand comes from the consumer and not the federal government. And yes I have disconnected them in my car. I don't want them blowing up in my face