Well, better they beat on each other than some innocent bystander......as for the kicks in the head after the opponent is down, and the internal bleeding/head trauma, maybe they died? If they did? YEAHHHH right on....
My attitude is: If you CHOOSE to fuck with the bull, don't go crying to mommy when you get the horn.
I grew up in a rough neighbourhood, whenever any disagreements arose, I could have easily pulled out a pipe and beat someone but discretion is the better form of valor. Whenever something really heavy was going on? I stayed away and stayed away from those that wanted things to escalate.