Mattisyahu:
Allow me a few words on the subject, not that I am an expert like you.
Kol Kevudah has got to take on a different emphasis than just staying home as much as possible. The idea is to be “penima”, to stay hidden. That encompasses alot more than just staying at home, which is really not such a challenge if you think of it. (see Rav Shamshon R. Hirsch on this passuk…)
Dina was punished with the story of shechem for going to a parade, where she should not have been seen at all. Her mother Dina went out to greet Yaakov and spoke to him in an “unrefined” manner, if i may.
Penima, as i understand it means you know you are a soul, not just a body. It means you do what you need to do in a refined, quiet, hidden manner, not in an attention seeking way. If a woman goes shopping and behaves as a bas melech should at the store, that is penima. Suggesting that it is preferable to shop online is denying that going online has its own hazards. Certainly no woman should take that advice before checking with their husband or rav! (imagine the scene, “Husband, dear, we need to get access to the internet because this guy on yeshivaworld said that its better to shop online than going to a store. Oy, I’ve been doing it wrong all these years!)
The real reason I have a problem with what you are saying is that i have heard a lot and read alot about the subject of tznius. And I have never (before this) heard of any Rav or knowledgeable authority (or anyone for that matter) explain it that way. Maybe since it just isnt feasable, being that our girls start going out really young to Bais Yaakov and all, but watever the case, your take on it is certainly original.