Alas, my term filling in for Jon Gordon on Facebook is over, otherwise I'd have to delve into this a little bit more.
In advance of the NFL draft, teams are creating "fake" Facebook accounts to try to get their potential draftees to "friend" them, thus allowing the potential employer to take a look at what's on their Facebook page.
"It works like magic," said a personnel source that was familiar with his team's tactic of using counterfeit profiles to link to Facebook and Myspace pages of potential draft picks. The source directed Yahoo! Sports to one of the team's "ghost profiles" - a term he coined because "once the draft is over, they disappear. It's like they were never there."
(h/t: Chris Dall)
The above is a well known technique used by many employers with regard to potential employees. Universities routinely advise their students prior to graduation to "clean up" their Facebook pages, lest the contents negatively affect future job prospects.
Many times Facebook pages give answers to questions employers are no longer allowed to ask during interviews. (Marital status, weekend activities, how interviewing is progressing, pending job offers, attitudes toward work, moral shortcomings, encounters with the police, addictions, use of illegal drugs, ...)
\\encounters with the police, addictions, use of illegal drugs
If you have any of this on your facebook page you deserve to not get hired.