We on Anime&Manga like images in chat, but we also like to still see relevant content in the starred chat message list. We just installed a chat bot that posts anime pictures from time to time and now our sidebar often looks like this:
I know, it's not cool to star trivial messages, but we can't do anything with our love for sweet girls. Which is why it would be for the best not to show oneboxed image links in the main starred message list, but instead move them to a separate mini-list made specifically for such messages (starred message list taken from DMZ chatroom):
Proposition: make a separate list of starred onebox images under the starred text message list, with thumbnails instead of just text links. Maybe even several rows. It should look something like this:
Other chat rooms will probably also love this feature.