Other studies have shown that employers may believe a person not on Facebook is a psychopath, although that's one of the most extreme conclusions.
While you might not think your profile is in the realm of scandalous, you never know which small no-nos might trigger a company's reconsideration. You can always let your potential employer know that you had a Facebook, but deactivated it to spend more time in the real world than the online. That sentiment alone could communicate that you aren't a Facebook addict, that you will ultimately be more productive at work.
Finally, if you're having a hard time getting a job, logging off Facebook will help your ego: You won't have to read about Becky's new job, in which she gets to »play with puppies and meet the President.«”