/Users/Abby is the home folder of a user account that has been deleted. Check out the screenshot:
While logged in as
work (which is no longer an account I use for work, but I can't be bothered to change the name of the home folder), the files in
/Users/Abby are do-not-enter.
I want to get into them to see if I've left any stuff behind, but I can't log in as Abby (since the user has been deleted).
While we're here, I'm not completely sure how I managed to delete this user account without deleting its home folder (or putting its home folder in a
Deleted Users folder). This all seems... quite odd.
I did all this user deletin' and messin' around in Lion and have since upgraded to Mountain Lion.