And more things for our "pass out the pistols on the playground" to think about...
There is another kinda campus where crazies have been known to come-a-bargin' and shoot a buncha peeps dead. And on these kinda campuses, there is no pesky 2nd Amendment to worry about.
These are of course, industrial campuses. Factories for example. I've worked in factories that cover several square miles, employ thousands 24/7, and have armed security departments larger than the police department of the town they were in.
The owners have a vested financial interest in promoting peace and discouraging murders in their places of business. And they can dictate any weapons policy they want... all the way from banning all weapons (except the security dept. and visiting police) to carrying weapons is a requirement of employment.
Please note that this is not a hypothetical... and please note that their is an entire mature private industry that does research, offers consulting, and even outsource regarding industrial security.
So...
How many large successful companies believe everyone should be armed on their campuses? How many actually implement such a policy IRL? How many reputable private security professionals would recommend such a policy? Do you believe that an entire mature industry, and the most 'successful' owners, are all wrongheaded, and have been for generations? And if you think schools are somehow different... how are they different?