Kolkata Man caught masturbating girl facebook lives incident how do we stop these perverts

A pervert, who was masturbating on a platform of the local railway station, was shown live on facebook, by one of the woman inside a train. The man was standing right outside the women’s compartment. Initially the women kept quiet, but then they decided to protest and informed the staff before getting back to the train. As soon as the pervert saw the staff coming, he ran away. The police later arrested the man, who is a 50-year old hawker after the woman approached Kolkata police.