Obviously this is totally anecdotal and I can't say if it plays out this way everywhere but in my experiences in the corporate world in two major regional cities here in the UK outside London, I've found that the 40 year old plus men that run the professional services firms and companies are mostly creepy slimeballs that range from mildly sleazy to outright made me fear they could be rapists. Even when the people I was with and "networking" with knew I was gay they wouldn't hold back on the, frankly, disgusting way they would talk about women, i've never experienced misogyny like it. Obviously just because people say things it doesn't mean they will carry out any of the things they say, and when you get too much testosterone in one room, the one-up-manship and dick swinging that goes on may embolden men to behave in ways they otherwise might not, but still it was constantly a truly scary thing to witness. And networking is bad enough without adding this side of things to it.
In one firm, I was single when I joined so didn't have an easy way to come out to colleagues and after a while felt like it probably wasn't safe to in any event, the way male co-workers talked about our female colleagues was scary at times. I'd like to think that my generation and younger don't behave in this way and that the middle aged men in these organisations now are the legacy and product of what went before them, and that future generations will have more of a clue, but it seems that men do model this creepy behaviour.
All of the rampant paedophilia that has been uncovered here in tv/media from back in the 60s and 70s shows that there is a whole world of abuse that has been institutionalised in major companies like the BBC, and it seemingly was all known about but kept hidden. It's pretty shocking really.
I think it comes down to local culture. I have female friends who are scared of working in tech now, but my mom worked in tech back in the 90's and never had any bad experiences working with men. One of her bosses was female, who later moved on to be a manager at Google, then Facebook. My mom said she just did her work and didn't try to call attention to herself, and men seemed to respect that.
I also think it may have had something to do with the work that she was doing - it wasn't glamorous programming work and maybe even guys were like "Hey, if the lady wants to do QA and debug, let her! We don't want to do it!"
Just anecdotally, I haven't had creepy guys hit on me at tech events (though I have friends who've had that experience

), but I have had older men comment about my grabbing a plate full of whatever they're serving. "Are you really going to eat all that? You're so tiny!" I just go, "Yup!" even if I'm going

and a little bit

inside.
I would really like to believe that younger men are doing better than the geezers my age, but the Gamergate guys and the college campus frat assaults are in your demographic. Not too many 60 year old guys avidly playing video games and uniting in online forums about it....
Sure, but exactly how many of them are actually displaying that sort of behavior directly?
I'm a member of a comic book forum. Posters are typically male, young, and most of them are probably gamers. There is a GamerGate thread there, and you know what? Everyone who's posting in it, except for exactly one guy, acknowledges that GamerGate is a thinly veiled excuse to be nasty to women. That one guy still insists that it's about journalistic integrity, and posts pages and page of "proof" about it, so it seems like the thread is taken up by pro-GamerGate folks, but it's really just the one guy.
Another geek forum that I'm on, people tend to disagree with Anita Sarkeesian's way of doing things, but they certainly don't condone death threats. And they treat the women there well, and we're a minority. Nobody's ever been nasty to us.
Like I mentioned, bad behavior is magnified online because the crazies are also really loud and obnoxious. I'm optimistic that it's getting better on the whole, but the minority crazies are just crazier because of ease in finding others like themselves online.