The online comic Qahera shows an avenging munaqaba fighting  sexual harassment in Cairo. It is a very powerful work, which captures perfectly the social dynamics surrounding harassment (the police officer who tells the victim: "Honestly, you have to look at what you're wearing, too," and that if she files a charge against her harasser, "you'll ruin his future.") 

Although I tend to think that vigilante fantasies (and I have many) -- and real vigilantism, like that of some anti-harassment groups, who catch and beat and spray-paint offenders -- far from being empowering are actually the expression of despair and rage. Sexual harassment is so pervasive that we can only counter it in extreme, even fantastical, ways.