The name is request for comments, but the meaning is technical internet standard. This RFC has already been published, so it's no longer just a draft.
I know. That was meant as a joke somehow. But nevertheless, you can email the authors and tell them about your concerns. I think there's a process of improving RFCs via errata.
This one is an informational RFC though. No internet standard.
It's an informational RFC which is already published. So there's no review process anymore, it's done already. And as it's informational, it's not a "real" standard (no going through implementations etc)