By Randy Mitchell   First, a painful confession.   Seven years ago I was a hater. For a number of reasons, I simply could not take social media seriously, especially when it came to B2B marketing.   That cautious thinking seemed to make sound business sense at the time. Our agency accounts were global companies. We worked with top-level decision makers that had ironclad objectives. They needed to grow market share, not followers.   In short, ROMI was the mantra and every campaign demanded tangible results.   If I had actually dared to suggest using social media to that C-Suite group, their first reaction would have been laughter. That would have been followed by this bottom line challenge: “If you’re really