Since you are making valid points and being downvoted for the pleasure. The platform-specific nature of <zone_id> makes it difficult to impossible to validate

Since you are making valid points and being downvoted for the pleasure. The platform-specific nature of <zone_id> makes it difficult to impossible to validate the well-formedness of the URL (see https://tools.ietf.org/html/rfc4007#section-11.2 https://tools.ietf.org/html/rfc4007#section-11.2 , as referenced in 6874, to fully appreciate this special hell). Even if we could reliably parse these (from a URL spec standpoint), it then has to be handed 'somewhere', and that opens a new can of worms. https://www.w3.org/Bugs/Public/show_bug.cgi?id=27234 https://www.w3.org/Bugs/Public/show_bug.cgi?id=27234