A new survey finds more employers are looking at job seekers' social media activity. And in some cases applicants are rejected because of postings on Facebook and other sites. ABC News reports the new survey of more than 2 thousand hiring and HR professionals says many closely monitor job applicants' social media postings. 51 percent of employers say they now have found something on social media that has caused them not to hire somebody and that is up from 34 percent in 2012. Michael Erwin with CareerBuilder says this means that you now more than ever have to be very careful of what you are posting on social media and what your friends are posting.