I wish there was more robust study of the effectiveness, and also the downside risks. I haven’t seen hard data but I have to think that potentially having thousands of drivers on the highways and freeways all getting distracted by loud alerts on their phones at the same time would have a non-zero risk of contributing to serious or even fatal car accidents. There may well be situations that make such a risk worth it. But certainly something like letting people know that an evacuation order has been lifted doesn’t seem to me like it meets that threshold.
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