Kind of confusing, but what I want to do is hide a post if it has one category that isn't supposed to show up on the homepage.
example:
the second part of Ned's story (which is linked to by the first) is in three categories; Ned's stories, Opinions, and HiddenCat.
Because only HiddenCat is excluded from the front page, the post shows up. I don't want to exclude the other two, I just want to make it so that in the event that any of it's categories return as hidden, it hides the entire post from the front page.
I'm fine with it showing up under the category pages.
Extra info: I'm using Unite business theme on my site, and the Front Page Excluded Categories plugin.