What do you suppose is the over/under on this becoming a public utility, or just another aspect of running a proper regional 911 system?

This will go downhill fast once someone inadvertently loses their API key.

Swatting as a service!

What could go wrong.

If my messages never reach the police because your servers have a meltdown, are you going to be held liable?

This sort of service should be run by the government, not a company that may or may not be here tomorrow.