[tdfx]

Your argument is similar to the "why are you scared if you've got nothing to hide?" response to the NSA scandal. According to society, we all should be perfect citizens whose outward lives perfectly reflect our inward, private thoughts and actions. But we're not, and evidence to the contrary can be used against us.

But, for the sake of argument, let's say you are perfect. You don't exceed the speed limit, you don't haul drugs. But one of your elected officials really enjoys visiting his secret girlfriend on Sunday evenings. Do you still trust him to vote objectively in every circumstance?

True, I can't see XYZ agency using their records to threaten elected officials, either. But I doubt anyone was worried that promoting an egotistical bureaucrat in the Bureau of Investigation in the early 1900s would ever lead to the reign of J. Edgar Hoover. The whole point is that these things aren't a big deal on their own -- it's the slippery slope concept that should concern you.

[diminoten]

This isn't a privacy argument, you already (should) have privacy in the situations where you're not around other people or out in the open.

This is about the times when you're out on the street with everybody else. That's when you can't reasonably expect EVERYONE TO LOOK AWAY when you walk into a store, or buy a coffee or throw your trash on the ground.

It's those times when you're not private. You know, in public.

[nitrogen]

These things aren't legally protected because our cultural and instinctive expectations forbid them. Try walking down the street and looking every single person you pass directly in the eye for as long as they're visible. See how they react. Follow them around. Write down everything they're doing. Let us all know what happens.