You cannot just stop people on the street and ask for their papers. They broke no laws.
Tell me:
What law did a guy break when his rare gun collection gets confiscated just because someone decides it is too big and they don't see what need he has for it?
What law does a person break when a community decides he must take down his nativity scene @ Christmas because it was too religious?
What law does a business break when a customer want them to provide a service they don't offer because it offends them, so the Fed sues them?
What law does a president break when a political party decides to pitch a tent up his ass for a few years because they didn't like that he beat their opponent?
What law did a panicked dental assistant break when she gets gunned down in her car for making an illegal U-turn in Washington DC?
What law did a border agent break when he merely stops a couple people speaking a foreign language at the border in an area where no one normally speaks foreign languages, just to check them out enough to make sure they aren't any person of interest?