I meant my comment as a lighthearted joke. But if you're asking my opinion, I will say is that the only thing that will stop a mentally ill person with a gun is a good guy with a gun. There is no magical scenario where a law will prevent someone from doing harm to others if they have their mind set on it. Murder is already illegal yet completely disregarded. Passing more laws just makes innocent people easier targets.
Discussion
I appreciate your opinion and agree. I wonder how many people who choose to carry in spite of the laws will find themselves in trouble waiting for the legal framework to catch up with the social context.