Because someone posting someone else's material cannot put it in the
public domain without the other person's permission, the click-through
agreement does not apply to such content. The question then becomes,
do we want to remove CC-BY or CC-BY-SA content posted by others? Given
the above, I'd say that it's reasonable to label content under CC-BY
as such and keep it. As for CC-BY-SA, GFDL, etc., the situation is not
quite as clear, but for the sake of interoperability, I'd be inclined
to be in favor of allowing such content when labeled. Wikinews stories
are relatively independent from one another.
If this becomes established practice, it may make sense to amend the
copyright notice to say ".. is in the public domain where not
otherwise noted."
Once again, many legislations forbid that authors put their work in PD.
Why ? Because publishers would be very happy to force them to do so !
It's a protection for authors.
So, chosing PD as a basis is a major legal flaw that will give wikinews
team a lot of headaches... and that will make me very busy on irc :)