The image thumbnail thing fails to filter our fair use images along
with the usual lack of author and licensing information.
Hi there - speaking to one thing I'm familiar with, with respect to image
selection, we believe
https://phabricator.wikimedia.org/T124225 should
address fair use ("non-free") images, although page reparses will happen
gradually (pages are cached for up to 30 days or so).
-Adam