The Wall Street Journal reports on research that shows employers are using social media to look up job candidates and then discriminating against them. One lawyer advised that could be illegal. The WSJ reports: '"I advise employers that it's not a good idea to use social media as a screening tool," said James McDonald, a partner at Fisher & Phillips LLP who specializes in employment law. "You need to control the information you receive so you're only getting information that is legal for you to take into account."'