Securing User Overides

I would like to stop users from creating their own user overides, and instead restrict overide creation to just restricted people. Can I do this through user security? I cant see a way how as the overide creation is done through th preferences option on an application and this looks like it cannot be locked down.
Has anyone else managed to successfully secure user overides via security or any other menthod?

thanks

I do not think you can stop a user from creating a user override. User overrides are cached in memory and are not written to the F98950 table until the user logs out. You can probably put row security on the F98950 to prevent the records from saving. You could also add security at the DB level to prevent them from saving. But you cannot stop a user from recreating the overrides.