MyBook Security Issue - Private Shares

Setup private shares, fine.  Mac access with login to private shares, fine.  Ipad access via 8player and many other media players, not fine.  Videos, photos etc, located in private shares are accessible to each of these players with no authentication required!.  Via TM running on drive?

What is the purpose of setting up private shares if simple ipad apps, downloaded reform AppStore bypass so called drive security and can access files in private shares?

help!

latest firmware applied. 

Turn off the Media Server on those shares, then.