I think this could make sense since it's effectively an application/presentation layer abstraction, platform-agnostic, free to use, and with servers available for licence-fee-free on-prem hosting, e.g. by the governments trying to send these alerts out -- so govts could be responsible for uptime as well as how to present data to users.

Of course, this raises in my mind two issues:

- How can this clearly improve on the existing emergency alert systems? (I'm thinking better geographic granularity and rich media, but that might not be a strong argument)

- Would most people be ok with having this software on their phones? (This is coming from a place of having friends and relatives who still believe COVID exposure alerts were a government spying program of some kind)

This is also working on the assumption that the government is both technically competent and design-minded enough to both have high uptime and present data in a readable way, and I may very well be ignoring some downsides of using ActivityPub that I just don't know about.