Ok, listen. I'm all for getting revenge on people who mess with my friends and family, hell, I would do the same. But don't bring a knife, bat, ex. into this. Because by bringing a weapon into the fight you up Simple Assault to Assault with a Deadly Weapon. That brings up the charges from a misdemeanor to a felony. With a misdemeanor you are looking at community service, anger management class, and possible probation tops. But if you use a weapon you could be looking at a potential $10,000 fine, paying for victim injuries, and 2-4 years in a state prison.
Think about this.