If we go back to the birth of 'Superman' and 'Batman' in America in the '30s, they were created because of events like the Great Depression, crime and Al Capone, among others. Everybody was corrupt back then, and if you can't have a hero in real life, it helps to have one in your fantasies.
Post my parents' divorce, when I was 10, my mother, Deepa Motwane, took up a job as a line producer with documentary filmmaker Shukla Das, who was a cousin of hers. When I was 17, she did a TV talk show and I helped her with research and assisted her as she was also producing that show.
I think vigilantism is a pipe dream, because the larger need is for a justice system that works. Now, Batman cannot be Batman without police commissioner Jim Gordon, because every time he catches a villain, he tries to send them to Gordon. So, the idea is to help the justice system to work. I don't think it can work in real life, though.