If your 11 yr old was found to be involving themselves in gang activity...would you do as these people did?? What would you do?

If you lived in a gang infested neighborhood and found out your 11 year old was now hanging with gangbangers,would you video tape a belt whupping of this lad and post it on his Facebook homepage as these people did? Should outsiders intervene in private parental disciplinary moments? Should these adults be adjudicated for their actions or should this be a private matter handled by this boys mom?

How would you handle this situation with your child better than these people did?