Business Insider of March 23, 2012 has a fascinating article speculating about the possibility that " If you solely rely on Twitter to post job openings, you might be unknowingly discriminating against older workers."

Read more: http://www.businessinsider.com/you-may-actually-be-discriminating-if-you-post-your-job-openings-on-twitter-2012-3#ixzz1q4JCchqD