Yet DNA is so easy to collect; you don't need permission. I think we'll have to get used to the idea of universal identification. Its inevitable. Better to come to terms with it.
I disagree that it's better to come to terms with it. If we were to normalize a sense of disgust at the practice we could institute legal protections against bulk collection. What you're describing is simply a world that few people want.
Like I said before, "I have little hope that we will be able to maintain this form of privacy." My dispute is that it isn't worth trying to save, or that it's a thing of little value.