JACKASS ALERT!
"Au contraire: controlling people who "have something to hide" is what it's all about...criminals"
My position is that you may not be a criminal today but you will surely be one tomorrow as soon as we detect you doing something that we don't like. And, we have this handy technology to track you with when you do it.
"see spies hiding in breakfast cereal."
We see news articles describing new technology that offers wonderful opportunities to turn us all into something similiar to an individual in a beehive: Monitored 24/7 on the street and in the home.
You are quite right. Be prepared for the evolution of the Borg party and their schemes for this technology.