The author gallery shows pictures for all your authors who have one, and lists the ones that don’t. You can also see the most popular authors on LibraryThing the same way.
Images have recently undergone a change a licensing. After considerable debate, a large majority of members (208/26) agreed with my plan to shift away from member-moderation of image copyright to the more common pattern of relying on the instruments and protections of the Digital Millennium Copyright Act (DMCA). The upshot is that while LibraryThing, like all websites, still prohibits uploading copyrighted content without permission, members are no longer encouraged to flag and remove images for copyright reasons on their own authority. If I have time, I’ll write up a longer blog post about the change, on Thingology.