I'd rather not see the users pictures at all. With most sites it seems you end up with a few bulk submitters in each category. Seeing their faces/avatars over and over again would get really old really fast. I could see it also potentially altering voting behavior. There are certain users on all social media sites (reddit and hn included) where some users will be upvoted/downvoted just due to their popularity or "fame". A visual indicator might increase those trends as they are faster to spot.