The people out late at night--for whatever reasons--are different from you, who doesn't stay out late. They're the ones getting asked for "papers, please," not you. So...because they organize their lives differently from you, it's okay to stop them and make them show their papers just because they're out late?
Nope. But "enforcing the law" should be based on some kind of, let's call it "individualized suspicion," not just "he was out late."
Sure. Couldn't someone out late possibly be coming home from a late shift, or going to the grocery, or visiting friends, or not breaking any law? Is being out late a crime, or even inherently suspicious, in and of itself?
I'm sure they were. How many cases did you see of people getting stopped and having to produce their traveling papers who weren't doing anything wrong? I'm going to go with roughly none, since those wouldn't have become "cases" in the first place.
You're old enough to remember how our politicians used to shame Communist countries about having to show their papers to travel; now, you seem to be cool with it because it only happens t "those" people.
You seem to be reading more into my questions than what I believe. After all, they were questions, not statements on my part as to justification for the stops.