I have a user that I have set the media start node to a folder called "Blog Content".  I want this user to be able to upload / delete media in this folder only.

However when this user inserts an image using TinyMce and goes to the "Create New" tab they can "Choose" the "Save At" folder.  If they do so and select "Media" from the popup this selects the root media folder, not the start at folder "blog content".  The image is then uploaded to the root folder.

Is there any way to remove the "Choose" link from the insert image dialog for certain users.  Or make the Media folder in the dialog point to "Blog Content" instead of the root.