I was applying for a job once and recruiter told me I need to have at least 100 Facebook friends to be hired. Played Mafia for a couple of days and got 400 "friends". Was hired and HR presented me at the company meeting as a social media star)
If I'd been talking to that recruiter I would have politely declined to continue the interview process. Unless the job itself was directly related to interacting with people on Facebook, the number of Facebook "friends" you have has nothing to do with your ability to do the job.