The duty of the strong (no matter gender, sex, or sexual choice) is to protect the weak against the bullies, and the bullies, always (ALWAYS) flee, when faced with real people. We have girls on our crew, and when some street jerk calls them down we back away, because we do not want them to think we don't respect them. But, we don't back down too far, we want that jerk to know, if he wins that fight, that's going to be the least of his problems.
And, what I've learned after years of grad school, is that colors matter. I would never go against my crew. "I didn't see anything." End of statement. No matter what he says to the cops, its his word (one person) against 12 who did not see anything. No arrest there.
And yes, some guy beating down some girl, is going to get his ass kicked by us. Call me a male for that, but girls love it. They are safe with us. We protect women, an old fashioned deal, but that is the deal gone down nonetheless. By the way, if you hit a girl in front of us, its our girls who would be on you first, we just follow them.