Until someone figures out a way to read a persons thoughts, nothing they do will help. You can't tell if someone is a criminal or not by the way they look. You can't tell if someone is going to snap or not. Laws do not deter criminal behavior and they never will. Laws, like locks, just keep honest people honest. If the laws detered criminal behavior than nobody would commit murder and nobody would do drugs. Another law about guns means nothing for the criminal populace.
In some cases, there are people who know. Unfortunately, it isn't 100%, but nothing is ever 100% anyway. Take Lucinda Roy, professor at Virginia Tech.
Here's a good article about her. She warned everyone who would listen, and nothing...
There were warning signs for the Columbine shooters too. And the same with the Colorado movie theater shootings.
People close to these nut cases knew these people were not right. Often it's teachers who really know who the future nuts and convicts are going to be.
We have spoken and you know I am not in favor of any bans on particular weapons or magazines. That will clearly do nothing.
Nor do I favor gun registrations of any kind.
I have even thought of letting kids take target shooting classes in Gym class to familiarize them with the safe handling of guns. That might help cut down the frequency of accidental shootings.
This subject needs to be thought out and studied. We don't need knee jerk reactions (Like the present proposals) but there is a solution to every problem.
So far I like the NRA proposal of having trained armed guards in schools.
People need to know they are going to pick up their kids from school without being full of holes.
Some of these kids were literally shot to pieces. Not acceptable...