[Connect] Is It Possible to Disable Ribbon Customization?

Is it possible to disable the ability to customize the ribbon?  

I am creating a custom ribbon for our users, and I have this image of them deleting buttons, tabs etc.. and then calling trying to figure out how they could get them back.  I would like to disable their ability to customize the ribbon at the workspace/workset level.

I've searched the forms and the show configurations file but can't seem to find if there is a configuration variable to do this.

Does anyone know how to disable the ribbon customization feature?