TN is right...but why would you want to do that? We'd hate to lose you.
The people TN mentioned can also change your screenname if you need them to. Hope you decide to stick around. If not, you don't have to delete your account...just anounce it in the Gone and Away thread...that way if you ever change your mind you can come back.
Ahhh..well, you can edit out all your personal info...e-mail, specifics, and the like. Then when you're older and allowed you can come back. You would be listed as a member, but not an active one for the time being. Hope they'll let you come back some day. It's a family friendly forum. But, it's good to do as they wish.