even if you delete your account to 'hide' it, if someone already started discussing it, it would be still visible (staff, correct me if i'm wrong here). so then i can see the history of your accounts, and what people have said in the past.
an account can be successful in the beginning, but as time progresses, it is more easily seen if this is actually a successful system, or just some lucky trades.
what i would like to see on a members page is how many accounts he has opened and deleted - if i see he deleted 9 accounts recently, and his last one is successful, then something is fishy here..
don't you agree that from investor's point of view, it is a valuable information?