> feel free to provide fake information as it doesn’t verify any of it

Uhh... Please don't. This is how nice things get taken down due to abuse.

> This is handy because many (though not all) certificate authorities refuse to serve .arpa domains

IIRC, .arpa domains are based on locations in the address space. CAs are supposed to secure your connection to a specific entity, not only a specific location, so that's probably why.