As I understand it, there is no middle option of blocking an avi per user. If you block an avatar by clicking on a person, that avi will never be shown by anyone using it. I didn't realize this and was confused when someone's avi was blocked without me remembering why I did it. Sometimes you wanna block an avi because of the person, but still want to be able to see it in another situation. So I think we need a middle ground option for avatar blocking.