That was still such a stupid comment.
If someone at Tech had a concealed carry (even illegally), there's a good chance at least most of the 33 people killed at Tech would be alive. It wouldn't have saved all, but it would probably have saved most.
But that's okay, I mean we all know zero-tolerance policies always stop whatever offending practice occurs, right?
The same for gun control. When you take away the use of guns by law-abiding citizens, don't be surprised when criminals (Big gasp here, break the law) and illegally obtain a gun.