Okay, so there's rikameme shitposting in the comment section: GamerGate is using the Ashley Madison leak to do evil stuff again. Might as well do the complete rebuttal here, correct me if I'm wrong.
"It's Internet Aristocrat, he's connected to GamerGate"
Story time about Jim (alias Internet Aristocrat, alias Mister Metokur). Internet Aristocrat was one of the first to ignite the fire, and if it wasn't for him GamerGate wouldn't have turned the way it has. That was a year ago.
Something like four months into GamerGate, some supporters asked him to calm down. He saw this as tone policing. As he disagreed with the path GamerGate was taking, he left in a shitstorm: he terminated his Internet Aristocrat account on YouTube and Twitter, uploaded an audio log ("fuck ya'll I'm out of here"). And later discreetly resurfaced as Mister Metokur and never used the GamerGate hashtag since.
If your ex-boss demands you to work extra time this weekend, you don't have to go: he's not your boss any more. My friend stabbed me in the back? He's no longer my friend. Should I still consider Miles Cheong to be into SJW stuff? No: he said he was done and apologized. Same applies here: Jim left, there's no more connection. People change. Get over it.
"The threads were all from 8chan"
Two things. First, by that logic GamerGate can be blamed for anything screencaped from the Internet since GamerGate is on the Internet. That's low, even by my standards. Boards on 8chan are independent, like users on twitter are independents, and accounts on tumblr are independent. Lumping everybody in the same blob because they are all hosted by the same service is a dangerous oversimplification. So I'm only going to look into GG boards.
"The /gamergatehq/ was already on page 5 when I capped"
So I take it's not overly popular then? Let's look at it anyway. I parsed the 450-entry long catalog and found only 2 threads (to put that in perspective, that's 0.44% of the board's thread -- I'm not even counting the replies or activity, just the heads): 253417, and 232196. If you have others threads regarding the Ashley Madison hacking, please do submit the links or the IDs.
Let's start with the oldest: 232196 is dated from July 20th, 2015. OP submits a link to an article called "Cheating website Ashley Madison has been hacked and customer details leaked" and explains: "I usually lurk but seeing this in a news trend I though it might be a good thing to dig into (…)". The thread has 23 reactions. First reply: "GTFO". Everything after: nothing relevant. There's no link to any data. Anons are pondering whether or not it's okay to look into it. Some are mocking TheQuinnspiracy's (for those who just joined, that is Zoe's twitter account) reaction to the leak. And finally, there's a link to BroTeamPill's twitter that says "Zoe had an AshleyMadison account". That's all there is. That's was one month ago and nothing happened: the thread lasted for 17 hours and died.
Most recent thread: 253417 is dated from August 18th, 2015. OP starts with a link to a reddit post, the content was removed, but someone screencaped it. TL;DR: "GamerGate is a divisive and touchy subject, my four years old relationship with my girlfriend is on the brink because she's against GG and I'm leaning pro. When she learned I was pro, she called me a "fucking misogynist", and refuses to marry me even though it was in the plans before GamerGate was a thing. I don't know whether I should just side with her or camp on my position". The /gamergatehq/ thread has 38 replies, the first few comments are "this guy is blind" and "he's a cuck". Later on, the conversation goes toward "we're not getting a full picture of their relationship" and "I couldn't not imagine myself in his situation". Then back to "beta as fuck" again. And then: "We're going to ruin some SJW/media relationships with that Ashley Madison leak, I tell you what", followed by "please elaborate" and then a summary of the hacking that happened. That's all there is: 1 reaction saying "let's use the Ashley Madison leak". One out of thirty-eight. This thread lasted for a tremendous 25 hours.
"But twitter said"
Twitter says nothing. There's a rumor about a rumor. Here's a search using the AshleyMadison and GamerGate hashtag. Contains nothing of worth: either "I heard GG is doing this", or "I heard people said GG is doing this", or "blame GG regardless". Then there are two people mocking Sam "Bring Back Bullying" Biddle and Van Valkenburg (yep that's Zoe, see 232196). There's also CodingTeddyBear. That's one GG supporter being enthusiast about the leak (liking to /pol/ and /v/). That's only one, but cheer up: if he's really a bear, at least it's a big catch! Another more evasive search contains the same he-said she-said. So bascially nothing.
"Not everybody with GG condones this"
That's the point.
"Sorry, you can try to dismiss this all you want but these caps are real and, if you aren’t convinced"
Try being the keyword here. There's nothing to even try, there's just nothing to dismiss: the sources are there, and there's just nothing. I can't see the tanks, I can't see the hate mob sharpening their axes, I can't see the evil alliance organizing its witch hunt against unfaithful partners. Nothing.
On an unrelated note, I'd like to know where the rumor is coming from, it's useless to feed it.