We have shifted from relying on the whims of society for justice to relying on the judicial system for justice. There isn't a "separation of the two" even now,

We have shifted from relying on the whims of society for justice to relying on the judicial system for justice. There isn't a "separation of the two" even now, there's only one recognized system for determining justice. Vigilante justice is illegal. No, I absolutely would not help a loved one achieve some sort of extrajudicial punishment, I would instead strongly recommend against it. I would try to comfort and support them, responses that are helpful regardless of how good or badly I personally judge their case and related punishments. I would tell them that perhaps the justice system has failed them and no system is perfect, but vigilante justice is a terrible and unproductive response that breeds more injustice than it resolves. The way you fix loopholes in the justice system is by fixing loopholes in the justice system. The justice system is governed by laws developed by deliberative bodies held accountable through democracy. It's not pretty and it's not satisfying, but after centuries of gross injustice we should know better than to trust mob justice.