If the call was for nationwide uniform gun laws, or for mandatory gun education, I would see that as moderate and reasonable. Adding additional regulation to legal gun owners - who are already under an onerous burden - is extremist in it’s lack of understanding. No matter how many laws are added, those with criminal intent are not impacted (by definition).
It’s like adding additional items to the FBI warning at the beginning of a DVD that you have legally purchased. “You must stand on your head and spin around three times before you can watch this DVD legally.” Those that pirate are not impacted.