Crazy that theres no cryptographic authentication. I get the whole point is rapidly informing, but there should still be some trivial barrier to sending out an alert
A surprising amount of important systems work because nobody can he bothered to mess with them. I think the takeaway is that most people are good, but perhaps also a bit lazy.
Cryptographic authentication means somebody needs to require a set of trusted keys (or a PKI or similar), and I could imagine that during an actual emergency, availability might be a higher priority than non-spoofability.