(...) even people who have done nothing wrong (...). And anybody who has done something wrong should (...)
The problem is that everyone has some something wrong. There is some kind of law, statute or rule that you broke... or didn't follow strictly.
This day and age there are so many rule, such broad law, that everyone had some something. Even if it as minor as jaywalking. Or driving over the speed limit for a couple minutes. Or parking a little too far from the sidewalk. Or something else completely different that in a given place is a misdemeanor.
I'm not screaming "evil big government here". I'm actually a law student and an intern in a attorney office. We all break some law several times every day. But these are such minor things that the legal system simply don't care. Maybe it is not a criminal law, but only enough for a civil lawsuit. But we are still breaking the rules.
In the eyes of the law, no one is 100% guiltless, even if they are innocent.
This is one of the problems why the legal system doesn't work. We punish too many things, so we punish badly. And, in that scenario, when the policing forces (local, state or federal) get increased powers and broader mandates, they get carte blanche to so pretty much what they want to anyone they want. After all, everyone is guilty of something.
Things are only getting scarier.
"Give me 6 folders of porn from the most innocent of men and I shall find something in there to hang him."
In some places it might be porn with wrinkled 60 year old women in school uniforms. In other places, porn featuring women whose breasts are too small.