The none cypher provided this without encryption, but it's long been deprecated.
There are other, far better authentication methods for things like emergency services, and I'd rather have unauthenticated information, than no information at all anyway.
You also don't need authentication to stop ISP's being stupid, for that Integrity is all you need.
Obviously it's not perfect, but being not perfect is no excuse for refusing to use what we've got right now. And it's not a choice of unauthenticated information or no information, it's a choice between authenticated information and possibly wrong information.
Trusting ISPs to have integrity is in my opinion much more absurd than trusting CA's. CA's have a financial motivation to keep their CA status which browsers can revoke. ISPs have nobody keeping them in line.
Really ?
How many of the root-certs that are in your browser by default do you actually trust ?
What objective evidence is there, that any of them can be trusted ?