black/white list to decline orders

@Michael Bissett

I have created support access for you. Regarding WooCommerce and Wordpress . . .

There are customers, for whatever reason, we would like to decline orders from. They may have abused x, y, z privileged so we need a "decline list" when they go to put in orders. I had originally thought this was called the "white List".

Any info or suggestions would be greatly appreciated on this.