Then it's a community issue. I don't see how games influence that sort of behavior when these groups could very well be more the exception than the rule.
The smallest dogs bark the loudest. We can whip it with the newspaper into forlorn silence if that's what people want, I guess. It probably wouldn't solve much in the long run, but it'd be a start maybe.
Or maybe this is a more deep-seated issue. Maybe the younger crowd are playing games they shouldn't be because their parents decided the XBone was a good replacement babysitter, and being exposed to the stuff better suited for adults made them these hate-spewing brats who think they have the right to scream at everyone that they don't like because no one can reach through the tv to throttle them.
Now, for the points made;
1- Inexcusable. I can only assume these were made by immature teens and the like who think a girl who shares their interests would be willing to screw. It's usually the common lonely loser logic (or the L.L.L for short): girl likes games. I like games. Therefore girl likes me. Bow-chicka-hurr-durr.
2- Eh, I dunno about this. Like, people can have sexy voices. I've heard my fair share of sexy man voices. I'm a straight guy, and even I'm willing to admit a guy has a sexy-ass voice. I mean, it's not something you should base your entire perception of a person on, but I don't really see it as unreasonable for someone to say they're attractive if they hear some smooth baritone or a cute voice come on the mic. I mean, if it gets to the point of uncomfortable I can understand, but one off-hand comment about someone being attractive isn't going to ruin someone's experience. I've played games where dudes have had sexy voices and other dudes are totally cool with saying his voice is sexy. Does point 2 move into point 1 from this? Or is it just them declaring they find a person attractive and leaving it at that?
3- Now, I think this is an issue, but I don't think it's strictly a gender one. Keep in mind the competetive FPS mindset: "everyone sucks except me." Women are presumed to be poor at these games because female gamers aren't the majority. It's operating on the assumption that because she's a woman, she doesn't play games often. Because they assume a woman doesn't play games often, it is then assumed they aren't good at these games and therefore is a "noob." No one wants to play with bad players. They want to win, because in competetive FPS games, winning is all that really matters to some people. It's a stupid elitist mindset that doesn't just lock out women, but new players in general. I can agree on the notion that this happens to women more than anyone else though.
4- Bigoted vocal minorities are all over the place saying stupid shit. What can we do about them? We can't silence them, because freedom of speech is freedom of speech. If we can't convince them to see our side, what other option is there? All the majority can do is lead by example, acknowledge that the abusive portion is full of ignorance and stupidity, and leave it to rot in its own juices. Choosing to acknowledge them, or to challenge them, is treating their side of the discussion as something worth a smart person's time, rather than the ignorant blatherings of unreasonable radicals. If they aren't even going to try to construct a well-reasoned argument, why humor them? They say hurtful things, sure, but no one is agreeing with the things they say except their own.