I think that this False Alert was actually an excellent development. Because it shows how well the "real system" will work, if there is a real nuclear alert in Hawaii. And what we see from the results ... is ZERO percent success. The following news shows why ...

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Everyone was seriously thinking ‘is this my last moment on earth?'” says Gold. “People were texting their homes and telling people they loved them. People were crying.”
“Where do you hide from a nuclear attack?” asks Gold. “So, everyone just kind of milled around and asked each other where they were going and ultimately we settled on an interior conference room – sort of as far away from the outside as possible but we recognized it would probably be pretty weak shelter from a nuclear attack. But it was the best we could do.”
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So when people got the warning, none of them actually went to a real disaster shelter. Instead, they all stood around gabbing about it on their cell phones. That pretty much guarantees maximum casualties.

Any of these people could have found the closest basement, or underground level of a parking garage. Anything that's underground is way better than being at surface level.

I have mentioned this problem before on this forum.
Internet Paralysis.
People are so hooked on texting and social media, they would rather chat about "how they feel" about a situation, instead of actually taking real steps to protect their lives.

Unless Hawaii holds mandatory drills, and actually shows people where to go - and tells them to get their rear ends moving during a real crisis - the effectiveness is going to be zero.