[Dylan16807]

I'm more inclined to count students fighting off-campus about classroom grudges than to count non-students fighting on-campus.

And the idea of counting both doesn't seem right to me.

Though I'm not sure how my expectations align, in particular when I hear "school shooting" my first expectation is that there are multiple targets, not just one person. And it's hard for me to react to this data unless I know what percentage are single-target and what percentage are multi-target.