aerius wrote:
It is, but thanks to the fucked up law system in the US it's to be expected. Put it this way, in quite a few places I can blow someone's brains out with a gun in self-defence and not even get charged while if I step in to break up a fight I'm going to get sued to hell, lose a fortune in lawyer fees defending myself in court, and still have a good chance of being convicted of various felony charges.
Aerius, your perception of the US criminal justice system seems to be built upon rare occurrences, media hype, and movies. In other words, it is not an accurate representation of what is considered normal.
When you say there are a "quite a few places that you can blow someone's brains out with a gun in self-defence and not even be charged" you make it sound as if nothing is done. If you, a citizen, is involved in a shooting that's in self defence. There will be an investigation to see if charges are warranted.
There are a few places where it is assumed that your life was in danger just by the very presence of an intruder, like your own home, but even then there will be an investigation. Example - One guy in Utah claimed self defence in his own home. Crime scene was able to reconstruct the shooting and found that the home owner lied about the victim coming at him. They found that the victim was actually sitting down. The home owner was charged with murder because of that little lie.
If you break up a fight it is highly unlikely that you will be charged with a crime. An investigation will be done, and if it's found that you used force when it wasn't necessary to defend yourself or another person then yes you could be charged. Example - Two men are verbally arguing. You decide to take sides and punch one of them in the face. You'll probably be charged.
Another example - Two men are engaged in a fist fight. You decide to end it by attacking one or both of the men with a baseball bat. You'll probably be charged. However, if you use reasonable force to end a fight or to protect another then chances are you won't be charged unless your contribution added to the chaos.
The US criminal justice system does have a lot of problems, but your description is highly inaccurate. The situation that the OP is involved in is a civil matter, and that system is far worse off than the criminal justice system.
If a bystander stepped in to break up the fight in the OP, he or she would likely be charged with assault, assault & battery, unlawful restraint of a minor (which puts the person on the sex offender list), excessive force, and that's just what I can think of off the top of my head. You want to mortgage your home and lose your job fighting those charges be my guest, keep in mind that if you lose you're going to jail for a good long time.
He or she would not likely be charged with any of those that you listed unless they went far beyond the scope of defending that minor.