I was under the impression you had to be 18, not 16 to be in the armed services???
I think he was getting at the fact that lots of kids who are fortunate enough to have parents who will throw money at college for them to just go and party at someone else's expense (and these are A LOT of today's students) are not responsible enough to have a handgun. However, most of these kids in these pictures are freshman, meaning 18 or 19 typically and not old enough to possess a handgun legally anyway. The only people at college old enough, typically, to own and conceal handgun legally would be Seniors who are generally, A) Busy finishing up and graduating B) More aware of their limits with alcohol C) More responsible in general.
Also, again typically, these school shootings unlike most shootings happen during broad daylight which is not typically when college kids are getting plowed. Most drinking in college like most places happens at night.
Where I think I agree with the only faculty and staff being able to carry is that when these kids are drinking they will getting out their guns and showing each other and that is just a situation riddled with opportunity for AD. Forgot to tell friend gun is loaded, muzzle discipline, checking chambered if slide not locked back, all the little really important stuff will be overlooked when intoxicated.
18 year olds can own handguns. Carrying a pistol pursuant to the SDA is obviously a different story.
All of the arguments you make against college carry are made against all concealed carry. Firearm accidents and negligence are at an all-time low.