Maybe there will be a way to certify humanness. Human testing facility could be a local office you walk over to get your “I am a human” hardware key. Maybe it expires after a week or so to ensure that you are still alive.
But if that hardware key is privacy-preserving (i.e. websites don't get your identity when you use it), what prevents you from using it for your illegal activity? Scrapers and spam are built by humans, who could get such a hardware key.
Not even: the government is supposed to provide you with more than one token (how would you verify yourself as a human to more than one website otherwise?)
