maybe the sale of the ammo will become more restricted/heavily taxed. Ok wouldn't stop people stockpiling but it might be a start and doesn't take away anybodies "right" to own a firearm.
And it wouldn't do anything, anyway. That is simply more "security theater." It is common when practicing to use one or two boxes of ammo. A single $12 box of 9mm is 50 rounds. That means I could buy a SINGLE box, just once, and walk into a concert and kill 50 people. It is simply not practical or sensible. It doesn't matter that much if you had 100 rounds or 100,000 rounds.
But Brians right, these sort of events only lead to the interdiction of new measures. s he said its highly likely hotels will start taking more interest in what people are bringing in (hmmm waits for the first person to sue the hotel for letting this nutter check in with 29 firearms and various tripods after all what valid reason is there for that?)
What it really means, is that good people, who are licensed to carry, are going to be endlessly harassed everywhere they go. The concert example is a perfect one. So they set up "security" which will NOT stop someone who really wants to get in, or who stays outside and shoots in. But it does mean that GOOD people who refuse to be disarmed the whole way there, during, and the whole way back are punished- they can't go at all. And that leaves a "soft target" area of thousands of unarmed people just ripe for the picking. In the Sunset Strip shooting, it is true that having armed good people at the concert would have done nothing to help, that is the 1 in 1,000,000 case. In most cases the shooting is from within (within the workplace, within the concert, within the store, etc). And holding the hotel somehow responsible is insane.
What isn't insane is this- I will grudgingly disarm myself for an event if:
1) They provide ACTUAL tight security with adequate ARMED protection.
2) They search EVERYONE with ACTUAL searches, like at the airport.
3) They have an insured, secured place to STORE my weapon, on-site.
4) They can be held responsible for my security.
And that will never happen. What they want to do is token security (AKA "security theater") which makes the situation worse than none at all. It makes the ignorant "feel safe" when it actually does the exact opposite.