@ Nefla
I absolutely LOVE the clothing store example you made. I thought that was very well done and quite appropriate.
However, I did want to single out this portion:
The gaming world is already very unfriendly to women, you can't speak up in a FPS (unless you lie and say you're a 12 year old boy) without being sexually harassed. In MMO's people will often blurt out "women don't play games" into general chat and if you correct them and say "no, I'm a woman and I play games and so do my female friends" they outright dismiss you as a liar and say you are a guy in real life. I don't buy games in stores anymore (I buy online) because I got fed up with the assumptions that any game I was buying was for my non existent husband, boyfriend, or son or being treated like an idiot who would smash the game disc against my head because I was so stupid I thought that was how you play it. What grocery store cashier would look at someone buying a soda and tell them snidely "you know you drink that through your mouth right? You can't pour it up your nose." It would be ridiculous. Yet for some reason it's not only ok but common when it comes to game stores. I've gone in with my male teenage cousin before and the kind of statements and conversation HE gets are "man, this game is awesome, you'll be blown away when you get to chapter 3!"
It felt like you were speaking in absolutes there, although I'm sure you probably just meant that "a lot" of women feel that way or have been treated that way. The last direction I, for one, would like to see the discussion going is to point a finger at all the male gamers and say "shame on you" because they aren't ALL treating us that way. Not by a long shot.
I've been gaming online with a headset since 2007; largely played an online arcade racing game called Motorstorm and ME3 MP. Granted, roughly 90% of that online gaming time was spent on PS3 and it's also not been with competitive FPS, so maybe it's a different environment, although I have gamed ME3 MP mic'ed up on PC and XBox as well (again, not competitive FPS, so many that's where the majority of the harassment lies?). I guess I've just been incredibly lucky as I have not encountered any cruelty or harassment. On the contrary, most of the guys I have encountered thought it was cool that I was a female gamer and were happy to have me on the team... nobody coddled me, either, just treated me like they did all their male teammates. About the only time I ever encountered any sort of negative behavior, it was relatively minor and it was racing "clan" related rather than gender-based. And I do remember running across one or two guys who asked if I was a woman or a young boy and seemed a little shocked when it turned out I was a woman but, again, I didn't mark that in the negative column as they weren't rude or mean by it, just surprised and then they were cool after that.
I also think it's awful you feel you can't go to gaming stores. Yeesh. Awesome way to lose a customer.
Again, I suppose I count myself as lucky/fortunate about my local GameStop. I think I recall the first time I went in there, they asked if I was purchasing the game for my husband or son, and I remember giving them a really friendly-but-snarky reply about buying it for myself... and after their initial, "Woah, really?" reaction, they thought it was totally cool. I've since been in there many, many times and they are just as kind and courteous as can be, and we spent the past several months' worth of visits equally pining that we couldn't preorder DA:I yet at the time. LOL Went to a midnight release party for DA2 there and while I was, sadly, the only girl in line, I had a good time talking lore and favorite characters with the guys... and I even managed to kick the store manager's butt at some MLB game with the PS Move they were showcasing to pass the time until midnight. After that incident, I get treated a bit like a walking legend whenever I'm in there now. The "Resident Badass" as a few of them have taken to saying. LMAO 
I'm not saying it's not out there or trying to belittle anyone's personal experiences that run counter to mine. I just wanted to point out that it's not totally black and white here, either.