Yesterday one of my grandsons, aged 21 came home with a broken nose and a cracked rib, at least he thinks so. He was with a group of buddies and a fight broke out. There were two of them fighting one guy and this guy's girlfriend tried to break it up and one of the guys hit her in the mouth and knocked out a tooth and cut her lip. My grandson said he won't tolerate a man hitting a woman so he hit the guy and two of the guys jumped him.
His 12 year old brother had a boy picking on him at school for several weeks, his mother had talked to the teacher about it but it had continued. He couldn't take it anymore and he socked him in the face and knocked him down and jumped on him and gave him a good beating. He was expelled for a day but the other guy was expelled for a week since he brought it on himself.
In circumstances like this I guess I would reacted about the same way.