I love figuring out how to do things on Facebook. Because, for all the good things Facebook DOES let a business owner do with their Facebook page, they also leave big gaps in the business page mgmt tools that take some serious working around.
For instance, I just banned a user from a facebook page I admin. This user has not even "liked" the page. But, she harasses the customers of this client, so they want her banned. Which makes sense. But Facebook has no way to ban a user who you don't have a relationship with already. Facebook doesn't see a reason why you'd ban someone who hasn't liked your page, but of course real life and facebook rarely match.
With a bit of finnesse and tweaking, I banned her from that page completely. Even though she still isn't and never was in the list of people with any kind of connection to that page.
It took a bit of work, but I did it. And that user can no longer harass my client.
HOW I DID IT:
Well, in order to customize any action to a different user, you have to have their Facebook ID. Which is not easily available on a vanity URL'd page. So, first I queried the open graph to gain the user's ID (they had a vanity URL), which is the subject of my last G+ post - I provided a link to a page where you can pull the open graph info for any user.
Then (in Chrome) opening the full list of "likes" for that business page in its own window with a right click. Then I right clicked on a random "x" button that allows you to remove a person from your page's likes list and chose to edit the element rather than click it. Then I changed the user ID I was removing to the user I wanted in the code that came up (by right clicking and editing as HTML), carefully clicked back into the page from the code box, clicked the button I'd just edited, and the confirm box that came up said the correct name in it (not the name I randomly chose to use as her). I checked the "ban permanently" button, submitted, and it was done.