Okay, I think I'm at least semi-alert now.
Point one. That has nothing to do with gaming. As someone pointed out above, it could be a bar, or a bus, or a shopping mall, or a concert, whatever. Tying it to gaming seems, well, superfluous, and feels a bit like picking out a completely random group to antagonize.
Singling out any group that isn't specifically dedicated at putting someone down (in case of sexism see some groups of MRA and radfems) is wrong. It's not the group as such. It's the individuals. Doesn't matter what their unrelated hobbies are. I'm pretty certain there are a few serial killer rapists who love cute animals and like strawberry ice cream. Doesn't mean cute animals or strawberry ice cream induced those tendencies.
Point two. It seems hyperbolic. I, who I've been in written roleplay for roughly 12 years (I think? I don't seel like calculating atm.) in computer games since the early nineties, and occasionally go to tabletop sittings, have had exactly zero such experiences, nor do I know any female who has face to face. I've had random guys try and ask me out or struck up a random conversation on the street, but none have laid a hand on me, and those who have been a bit more persistent have been annoying at most.
Ironically, the number one (and practically only) person to make rapey comments at me has been a lesbian woman (I'm pretty certain it was her idea of humor, rather than her meaning those things seriously), and she eventually gave up, but only after I told her repeatedly that I find these jokes rapey rather than amusing, am only interested in male humans, and am eh, "soft dom?" ... nonsubmissive in any case, and essentially stated that if she actually tried something like that in real life, stopping force would be used. That person, by the way, also pissed off one of my male friends with those comments being directed at me. (Just to make it abundantly clear: that was an issue with this one specific person's behavior, not lesbians in general. I'd have reacted the exact same way to any male pulling the same stunts, minus stating that they're the wrong sex for me. I know several perfectly wonderful lesbians, including some who freely joke around about their sexuality and make me laugh while they're at it.)
It might be it's a thing only in certain regions. It might be it's something about her - not that she's "bringing it it on", but maybe she's simply, say, the cute, petite and busty sort, as opposed to having more model-type beautiful face, being tall and "averagely-endowed." As in, people won't assume she could knock someone to the floor when looking at her. I know my smaller and cuter acquaintance had a couple of odd encounters in Switzerland (and mind, that "small, cute" acquaintance of mine is a semi-professional dancer and actually has more upper arm muscle than I ... it's just her face and height) while I got a couple of random people just talking at me, but not one inappropriate comment. I probably also wandered about on my own quite a bit more.
And I by no means have "one in three has been sexually harassed" ratio among my female acquaintances. I'd also say that the ratio of general abuse is roughly the same between females and males, but the latter is much less likely to believe that they're being abused. (Indeed ... some do put up with constant abuse and then mutter something about "But I'm not a perfect person, either," when pointed it out. Guy, I have known you for years, I know what you're like, and I tell you, neither you nor any other halfway decent person deserves something like that.)
So ... yeah. Being where I am, I'm inclined to believe it's not "all the time, everywhere, it *will* happen to you if you are female and go into gaming," kind of deal, but rather a set of occasional, regretful instances. It's terrible that those things happen. It's important that people who do things like that are held accountable. But! It's also important we remember that those people are the rare freaks that occasionally pop up here and there, not the common populace. They are the abnormalities, the ones who don't belong, not the nice guys and gals.
Point three. Who should protect who and why, and what to fight against. As noted above, it's the individuals who exhibit the tendencies, not the group as such.
As for keeping the place safe ... that's everyone's job, equally. Everyone should know some self defense, male or female. Good exercise, too. Everyone should take some precautions (I know male aquaintances who're a head taller than I who have had knives held over their throats or ran for their lives ... I myself intervened a knifefight one time, between two individuals larger than I, may I add). Safety is everyone's deal. Everyone should stand up. Everyone should bring such things to light there and then.
There was this snippet above: " it's the fault of every ball-less asshole who didn't stand up" - but why only? If you don't know where the others stand, and the person undergoing the harassment doesn't show willingness to fight, then how is the person who stood by any worse than the victim who also did nothing? They have as much right to not be beaten to a pulp than anyone else, even if they weren't the original target. Realistically, fighting against two or more people at once is liable to end badly, be you male or female or a head taller than either of the two people fighting you. (It only takes a tiny woman with a sharp knife to kill a bodybuilder, giving the right circumstances.) If there is no danger of being beaten to a pulp, then why did the victim not react? There are plenty of people who have stood up for strangers and then ended up taking all the flak, including from the person they were trying to defend. Or at least have the person deny something ever happened, leaving the defender in a very awkward place.
Granted, if I ever saw something like that, I'd intervene, much like I intervened the knifefight some eight years ago. I'm inherently a soldier, a protector, a warrior. To fight, to set myself on the frontline is what I naturally do. But those I'm protecting should ideally also show some initiative, some feist. Doesn't matter if they're "small and weak". Strength lies in numbers more than the might of any specific individual (you try fighting if someone is kicking at the backs of your knees). Might not be even be physical. Can be simply words or text, or going behind the corner and calling the police. Going behind the corner and calling the police is fighting, too. It's *doing something* to fix what's wrong. Giving a testimony is fighting. Fighting comes in many forms, including the courage to say "Yes, this happened," or "This person only did so to protect me." Everyone should fight their own way, but everyone should fight what's wrong, be it by might, by word, or just by supporting the people on the frontline.