I decided to hide old-system avatars so that people would wonder where their avatar went and visit their avatar settings. At which point they'd see a special message I show people with old-system avatars and upload their avatar into the new system (which removes their avatar from the old-system, hiding the special message forever).I've noticed it took a (relatively) long time for several people I roleplay with to notice this change and upload a new avatar. Some of them still haven't done so. You could argue that this means that some people don't really care about their avatars, but it can also be interpreted to mean that this implementation is too vague.