As I said in the other thread, the right to swing one's fist ends at the other guy's nose. Helmetless biking harms (potentially) only the helmetless biker. Drunk driving has a strong potential to harm others. Helmet laws (and seatbelt laws, etc) exist only to protect people from their own actions. Drunk driving laws protect the public from a real danger. It's apples and oranges. What I said in the other thread was that our constitutional rights are absolute, which may have been misunderstood. I did also, at the time, add the disclaimer about rights going away when they begin to infringe on others.