"… People put their lives up on the Internet for everyone to see, and employers and college admissions offices have started to use social media to determine whether an applicant is a good fit for the company or school. Social media allows these professionals to see your social life and who you really are, not just what you put on your resume.
Your social media accounts can cost you a job if an employer likes your resume, but does not like what he sees you doing on the weekends. It’s important to always present yourself professionally and respectfully.
Your social media is not your secret diary; it is a billboard of who you are and what you do." …
More background on this important issue.
http://www.uloop.com/news/view.php/228063/The-Importance-of-Cleaning-Up-Your-Social-Media