> What's your take on it?
i think wikipedia appears to support your original position first:
> The author uses copyrighted characters, settings, or other intellectual properties
but supports the points i try to make here:
> Fan fiction can be based on any fictional (and occasional non-fictional) subject.
that implies worlds no longer restricted by copyright.
> It may infringe on the original author's copyright
implies it still may be fanfic if pd or free-licensed.