Working in true greyscale? Can this be set somewhere?

[aizome]

I produce a lot of artwork to be printed greyscale. No colour, none, never. 
I go to 'File' ->'Document Setup' and select 'Grey/8' or 'Grey/16' and still Designer seems to default to rich black. I have to manually check and correct the black/grey as I work.

Is there a better way to do this?

[aizome]

Just to add that while scrolling through the Publisher feedback forum I found posts saying that Publisher also fails to clearly distinguish between CMYK and greyscale images. I'm sorry, but that's a fundamental failure and means I can't use Publisher. As I said above, I often produce print jobs in greyscale only. No colour. I need to know that what I see and plan is what the client will get, without conversion in the press.