Most of the actions referred to in the article are mundane: you left your home, you got cash from the ATM, you used the subway, etc. I can't see how that can be

Most of the actions referred to in the article are mundane: you left your home, you got cash from the ATM, you used the subway, etc. I can't see how that can be used for anything against us. The real problem is the internet: when we express our political interests online, when we visit certain sites, a profile is built for us about not what we do but what we believe in.