100% agree and to all those in the comments that don't agree, here's two scenarios.
A) A gun owner with a concealed carry permit walks into a mall that clearly is marked "Gun Free Zone" with nothing more than a sign on the door. He is absolutely legally carrying. Suddenly, a shooter starts randomly shooting people and the gun owner takes out the shooter after only three people are hit.
B) A gun owner with a concealed carry permit walks into a mall that clearly is marked "Gun Free Zone" with nothing more than a sign on the door. He sees the sign, turns around, returns his firearm to his vehicle, then enters the mall. Suddenly, a shooter starts randomly shooting people and kills dozens.
Which scenario would rather have yourself or your family in?
If you choose B then you're in favor of random murder from people with mental issues.