I agree with Doro, save that I don't feel as strongly about not adding disambig lines that go to pages that don't exist yet. To me it just says: there is this other thing with the same title out there, you might've heard of it, but this isn't about that. I would add a similar line to a vid page, for instance, if I knew there were two with the same name, or that used the same music, to avoid confusion and to help editors who might want to start the other page.

Frankly I think all this is a considerable over-reaction to a single mistake by a new editor. People have made plenty of dafter errors on Fanlore, and it's a lot easier to fix the occasional mistake than to add a draft of new guidelines to "protect" podfic pages from "vandalism".