This brings up another question here: how does it work if moving notes from a shared notebook to a person notebook (at the receiving end - the "sharee's" if you will).
Will the tags created at the source be created in the receiving account, or disappear?
If they get created, this would probably be a way to transfer notebook ownership to the right party.
I have another usage scenario where this also has interest. I have a main account that I am mostly logged on to. On PC and mobile devices. This is also the one my web clipper is pointing at. Then I have a couple of other more specialized ones. (One specifically for freelance consulting, one specifically for personal studies with lots of material captured).
Since it is easiest to capture via the main account (I bump into lots of things relevant to the specialized accounts while living life), I would like to set it up so I can "hand over" notes from the main account to one of the others. Then pick them up in my "inbox" there, once I get around to it. Which means moving them out and to another notebook there.
Sometimes I already decide what to do with it, and assign some tags accordingly. E.g. if it is an action item, a reference item, a project support item etc.. It will be nice if those tags can carry over easily.