If the mainspring of popular government in peacetime is virtue, amid revolution it is at the same time virtue and terror: virtue, without which terror is fatal; terror, without which virtue is impotent. Terror is nothing but prompt, severe, inflexible justice; it is therefore an emanation of virtue. It is less a special principle that a consequence of the general principle of democracy applied to our country's most pressing needs.
I will set aside any qualitative judgments on that passage and consider whether the stick-up boy Omar Little from The Wire comes close to functioning in that role. A stick-up boy is someone who robs the drug dealers. Omar repeatedly talks about living by a code and when a drug dealer tries to pin a murder charge on him in revenge Omar has some credibility when he tells the police officers, "Did you ever know me to do a civilian?" More than this Omar operates with prompt, severe and inflexible actions. Another aspect of the revolutionary space that Zizek promotes is its radical egalitarianism. Omar runs with a tight group in which he himself is gay and includes his lover, women, and his blind "mentor" Butch.
I suspect Omar's mettle comes from a mixture of suffering (indicated by the giant scare across his face) as well as having a moral/spiritual framework from youth (in one scene he is attacked brining his mother to church). I have as yet to understand the 'human' role that would allow a revolutionary event that I understand Badiou or Zizek to advocate to be anything less than the terror that has occurred in the past.