Yep, bills could have provisions that cover the institution against liability if some student and/or employee carries and then does a bad thing.
But then how could lawyers make a living?
Quite simple. Throw in a liability clause making schools and any other places liable if they don't allow carry. We should turn damned if they do around on them to damned if they don't. Quite honestly I don't know why Virginia Tech's board of trustees hasn't been sued for every dime from their families 3 generations back and 3 generations forward, as they sure deserve to be.