Nonviolent harm can, should, and is punished through nonviolent means. If you're mean to everyone, you get socially ostracized. If you reveal people's private information, people stop trusting you, and they might harm you back in the same way. If you cheat on your girlfriend, you risk getting dumped. Reciprocity is a basic mechanism of society in all aspects of life.
Thanks for your opinion, Vitalik.
My concern is mainly for those who commit antisocial acts where a relationship does not exist that would allow for an effective measured social response / reciprocity.
Something like this. People who commit antisocial acts outside of their social sphere (implying that good relationships are maintained within social sphere). What recourse is available? If a direct, non-superficial social relationship doesn't exist between offenders and those who are insulted is there a social consequence to the offender at all? As for the punishment of social isolation this would require repeated and consistent poor social behavior by offenders. This would leave unaccounted for a great deal of injustice carried out under specific circumstances.
Another requirement for effective consequence is for retribution to have a consequential effect in the mind of the offender. I would think we can agree that quite a lot of social injustice is committed by offenders who have no regard for their victims. No regard implies no social relationship.
Are there real social consequences for all injustices? I say there are not due to my opinion that with such large populations we are not as socially integrated as needed for social deterrents/recourse.
So, moving past ineffective social repercussions is my point; Vendetta. Is there a rightful place for it in society?