What if someone asks a question about something you don't know? What if someone wants some constructive critisism on something he/she made, and you don't know anything about graphics?
The graphics forum is different than normal forums. You actually do need to know quite a bit about graphics to be a mod... better yet, a good mod. Mods who flame don't deserve to be a mod. If you ended up being a graphics mod, I would shoot myself.