drhowarddrfine --Well I just read the article you cited ( html5doctor.com ). The second sentence of the article, referring to the <address> element, says:
"But nearly fifteen years after its creation, it's still causing confusion among developers"
Certainly some of the commenters at the end of the article seemed confused. But I was able to make an interpretation, specifically that you are probably allowed to put almost any kind of contact information inside the <address> element, even links to other websites. In any case, I'm going to adopt the position that anything which validates must be within the rules.