You're pointing down the very best road that all this dragnet surveillance can take us: a war on the unexpected.
Once everything we do, on or off net, is observed and recorded, the only thing that Johnny Law can do is try to check out the things that are unusual: looking for fresh milk. Or wait, maybe you're one of the animal rights folks, and you're trying to figure out a way around the "ag-gag" laws. How does Johnny Law know? He or she doesn't. If you're lucky, like the photographer, they come ask. If not, you're on The List. Maybe you don't get to fly any more. Maybe you just can't get a new job.
Once everything we do, on or off net, is observed and recorded, the only thing that Johnny Law can do is try to check out the things that are unusual: looking for fresh milk. Or wait, maybe you're one of the animal rights folks, and you're trying to figure out a way around the "ag-gag" laws. How does Johnny Law know? He or she doesn't. If you're lucky, like the photographer, they come ask. If not, you're on The List. Maybe you don't get to fly any more. Maybe you just can't get a new job.