I've enjoyed the forums very much. I have recommended ArtRage and the forums to many people, and even a local school. However, the forums need some type of "tag" or "rating" system where some works can be filtered. I am sure you are aware in the USA we have certain Child Internet Protection Acts (not sure exactly what the acronym is) or laws that schools must adhere to. As someone who commonly deals with filters, it's a simple thing to block the forums, but with a lot of great art in the forums, it would be a sad thing to do.
I realize that there is an After 9:00 forum, but i notice works in other forums as well that might be construed by parents or administrators falling under child protection acts. This creates a problem for sys admins who wanting to grant access to works of art, but not having the time to review every forum topic and keeping an updated list.