[otrs] Admin-Area for agents not in admin group

Hi, I noticed that an agent who is not in the admin group gets the complete Admin-Area block when clicking on Company (Action=AdminCustomerCompany) or Customer (Action=AdminCustomerUser). The Admin-Area includes all the admin links for "Users & Groups & Roles", "Queue & Responses", "System" and "Misc". The agent is only in the user group with all rights (ro, move_into, create, owner, priority, rw). The agent is not allowed to actally perform any of the Actions in the Admin-Area ("No Permission to use this frontend module!"), but the links are there. Is this a bug? Or a feature? Can I get rid of this by some Config option or else? Thanks, gerhard