I'm a reasonably big dude, and back in the day when I first started bouncing and doing security, occasionally it would be necessary to break up a confrontation where a woman was attacking someone. Too often in that situation, the woman would then turn her ire towards me. Women fight dirty, too; biting, scratching, pulling hair, going for the groin, kicking. Women fight like they want to maim. Obviously I'm generalising, and that doesn't apply across the board and some ladies really know how to throw a punch, but in my experiance it's a rare occurance. Of course, most dudes can't throw a real punch either.
Anyways! When I first started bouncing, and I had to pull some woman off another person and she'd start attacking me instead, I'd do my best to restrain her and give her a warning that if she didn't stop trying to hurt me, I'd have to respond with violence.
That didn't last long. By the time I quit bouncing, if anyone at all came at me with intent to harm, I'd deck them. Usually I'd pull my punches -- regardless of gender -- because most of the time it was enough to get the point across. At the end of the day though, no one has the right to attack you, and no one should feel like they can do so without reprecussion. I honestly don't care how small, weak, or feeble someone is, if they've initated violence, then they deserve what's coming to them.
There's one specific incident I remember from early on, where I was trying to get this nasty ***** out of the bar. She'd torn my shirt in half, my cheek was bleeding from where she tried to claw at my eye, she was digging her nails into my fore arm and kicking me in the shin. I told her that if she didn't stop I'd have to respond forcefully, and she screamed right in my face, "You can't hit me; I'm a girl!" and kept kicking.
Yeah, it didn't take very long at all for me to stop warning women for no other reason than that they're women.