I'm attempting to add some forums to my Ignore list - but they are not present in the list of forums in the Forums To Exclude From View : Specifically - the Off Topic Recipes though it seems there are others missing as well.
Fixed... I have to run a SQL job when new forums are added to the site for it to be updated. I hadn't in some time. They are all listed now and you can ignore at will. Thanks for pointing this out.