There are still oodles of untagged images.
Well, it's about time that they just be deleted wholesale. But I know there's been a diligent ongoing project to tag them. I wouldn't want us to disrupt that valuable work by getting draconian all of a sudden.
That project has indeed been doing very valuable work. Lots of it. It should be noted, though, that there are now more than 5000 images carrying the "unverified" tag, those are untagged for most intents and purposes.
But still, I think it would be nice if the image upload system would automatically add the unverified tag if the uploader fails to provide a tag. That should further alert new users that we need licensing information on each uploaded image.
A helpful interface where the user could select from a number of tags would be even better. I've been on Wikipedia for more than two years but I still don't always remember the most appropriate PD-tag to use for each image.
Regards, Haukur