Hee, yes, that's exactly what I was going to bring up -- even with the access flow going the other way, shared journals still have lots of associated dangers. For instance, you might know that I have access to some_journal, but do you know that my husband also has access to some_journalstop people from sharing journals, and can never really know if it's happening) but explicitly granted access to multiple people (so far as DW is concerned, because DW knows how many accounts have access to that secondary journal).