I don't recall receiving such teaching in any grade. But everyone knew what those boundaries were.
Depends on where you are from, yes Americans years ago knew something like this incident was criminal, what if you are from the middle east, Africa or some other culture where women are treated a common property.
I have no way of knowing for sure, when reports like this don’t mention the race or ethnicity of the people involved, usually it means the criminals are from some protected class aka African American, Muslims, or your random illegal immigrant from some 3rd world hellhole.