This is quite an interesting idea. ARS is a new platform which allows you to give and receive critique on photos completely anonymously. Created by Eric Kim, the system is designed to help photographers get some genuine feedback without all the smoke blowing and fluff we often see on platforms such as Facebook.
When identities are public, many who respond to images will say something nice just to avoid the risk of offending, than to say what they really think of an image. With the identities of the photographer and the commenter removed, people can say what they really feel.