As I already said in the nap.wikipedia beer parlour and on the discussion list: I will now start to delete images without license information. I waited for quite some time before starting because I know they were copied from other wikimedia projects, but this does not help ... we need or license information on it or they need to be deleted. There are too many of them to inform the people who uploaded them about each single picture.
I would also propose to only use Commons. So if you have opinions on this: let me know here, on nap.wikipedia or in the discussiongroup email@example.com.
This is just to integrate what was already said since it could be some read the blog but are not really active on nap.wikipedia - so: they can contact me and remedy the situation for the pictures they uploaded.