...there will be more ammunition moving through Donner Pass than was moving on the Ho Chi Minh Trail during the height of the Vietnam War.
I certainly hope so, but that doesn't change the underlying threat of laws like this.
I was riding in the car with Staghounds on the way up to National Gun Day, and we were talking about how clean highways were now compared to when we were little. A combination of P.R. campaigns and laws have made tossing trash out of your car something that is Just Not Done; beyond being illegal, it's actually frowned upon socially. As Staghounds, who is involved with the justice business, put it, littering may be subject to more social opprobrium than wife-beating, given the numbers of empty McDonald's bags seen on the shoulder of the road versus the number of hit spouses he sees. That sea change came about in less than half a lifetime.
And this, as he points out, is why these nuisance gun laws like AB 962 must be fought, and fought hard. By making gun ownership as big a hassle as possible, even without outright bans, fewer people own guns. When fewer people own guns, you have removed them from the day-to-day experience of most people ("Nobody I know voted for Nixon.") Once they are removed from most people's experience, further legislation and demonization is easy. For an extreme example, sit in a pub or cafe in England and discuss your shooting hobby or gun collection with a friend across the table and see how long it takes for a nervous patron within earshot to call the heat; parts of urban coastal America are already like that.