By Ranjeet Jadhav, Rajendra B Aklekar and Dipti Singh

Social media has long been a virtual town square with a constant barrage of opinion, facts, nuggets, and accusations. Amongst the trolls is the stark, informed, authoritative voice of a few who hold position, rank and perspective to put things right on a subject. Sunday mid-day speaks to four such soldiers who keep the flag of their respective domains flying high, correcting errors, providing perspective and taking on trolls.