This is something that's confused me for quite a while. The application of the chosen terminology.
To me, copy means just that. All aspects of the recipe should be transferred as a whole, into "my recipe database". Now if that's the way it works great! But I don't remember seeing a "Copy" button. I just learned to 'abuse the favorite button' as a result. So the only recipe in my "box" is the one I manually entered.
But then when I read daath's statement above, I go right back to being confused. I've never been able to make sense of (or use, as a result of) the whole copy/adapt thing. "the adapted, unchanged version" is not an adaptation if nothing has been changed. It's a copy, and until it's adapted (changed) it should absolutely be private, and I would take that one step further, and make sure there way no way for the copy to be made public by the user. Again, until adapted.
As daath already knows, I've been a strong proponent for grouping/sorting/categorization features for months on end. But that's more to @Grubby.
I also agree that the original author should get credit, not just the first to post. I like the idea above for a "dispute button" or such. For cases where the author decides to become part of the community. (IE: EJAB -my only 'recipe' thus far, or Wayne, as referenced above) I posted it in honor of the creator, and I think most do that. I'd consider it an even bigger honor to actually have that person be here and interacting, and expect them to want to take ownership.