adom I'm not 100% sure what the request is. About images, there is already config option prevent_right_click, but technical users will still find a way to download if they want.
As for login, the user is either logged in or not. I don't think I will be adding a separate user-password system only when clicking to download an item. In the future, there will be different users, with different permissions, and you might be able to assign different access to certain features.