The counter argument you have chosen to go with is “man up”?
First of all kids can be big for their age and fifteen isn’t even that young.
Secondly there is no validity to the assumption that because someone is swinging their arms wildly that you can’t be hurt by them. That is a really dangerous assumption.
Third you make no effort to consider the physical disposition of the person responding to the fight. Are they elderly, as the man in the article is? Are they just physically small? I was 5’10" in 9th grade, I was bigger than half the faculty at my school. I was not even remotely freakishly large.
Basically you assume you can do this yourself (you offer no indication of experience in breaking up fights among teens) and you apply that assumption to everyone else.
