Your "err on the side of caution" statement misses the point. I wasn't asking whether the men in my examples had erred but rather whether they had committed crimes. The law does (and must) draw lines. The process is sometimes difficult and fraught with subjectivity. I was addressing that line-drawing problem, but there's certainly no moral requirement that you or anyone else take any interest in that subject.

You're certainly correct that what's legal and what's ethical are two separate categories. My first post (#21) made clear my disapproval of the college student's conduct before I got into the question whether it was a crime.