Community Auth - User Levels

I thought as much, I thought perhaps a method such as require_min_role would allow access to anyone with that level and above.

I understand how to use the require_min_level as it redirects back to the home method if you do not have access, my issue is with verify_min_level, if the verification fails, (user level not high enough), I just get a blank white page! Is there provision to show an error message instead?
If not can I do it by editing the authentication method itself so I don't have to add it to every single controller.