I've been starting to see this argument being put forth by anti-GG people who actually try to engage on the journalistic ethical issues:
"What's wrong with game reviewers injecting personal agendas in reviews? It's their opinion, ok? If you don't like it, don't read it!"
I'm going to do a allegory synopsis of Gamergate that hopefully even non-gamers can understand.
Imagine you are a Windows PC user, like 93% of people are. ( http://www.netmarketshare.com/operating-system-market-share.aspx?qprid=10&qpcustomd=0 )
You go to hypothetical tech journalism sites like pcworld.com and ilovecomputers.com to get software and technology news/reviews. Windows 7 is about to come out, and you're not sure whether it's worth upgrading your Windows XP or not (you skipped Vista after all). So you go to pcworld to see the review of Windows 7.
The review curiously doesn't talk much about Windows 7 other than some cursory descriptions and spends the majority of the review talking about how inferior Windows is compared to Mac OSX and how the design of OSX is way better. In the end, you don't know much about Windows 7, but other places seem to indicate that it's way better than XP so you buy it and are completely satisfied. You take note of the tech journalist who made that curious review.
Fast forward a few years later, and Windows 8 is coming out. That tech journalist has now inexplicably become the editor at pcworld, and the site now seems to contain a disproportionate amount of content focused on praising Macs. Many articles even appear to call the intelligence of Windows users into question. The review on Windows 8, again by the same reviewer as before, is yet more praising of the advantages of Macs and the disadvantages of Windows, concluding that Windows 8 is a mediocre OS unsuitable for anyone, and that anyone who buys it is a fool who is against technological progress that only Macs can provide.
You're kind of pissed now, and post a comment under the review questioning its veracity and why they assigned the review of Windows to someone who clearly hates Windows. The editor appears and mocks your comment, before locking your ability to post under that review.
You go to another one of your news sites and it's the same thing - bashing Windows and praising Macs. Articles highlighting software for Macs seems disproportionate to other content. What was once mostly informational pieces have predominantly become opinion pieces and editorials. What's going on? You check online again to see if you're going crazy - nope, Windows is still used by >90% of computer owners. Who are they writing for? Why the obvious agenda?
Weeks later you find out that not only have the reviewers at your site been collaborating with their competitor sites in order to intentionally bash Windows, but said reviewers and sites have been receiving free hardware from Apple. People keep digging and find that said reviewers and even site editors and owners have been partying at Steve Jobs' house regularly over the past few years and are friends with numerous Apple employees and Macintosh software developers, whose obscure software has been featured numerous times, all with glowing reviews and presented as superior to other software that most other people in the world are using. The "software program of the year" that was highly decorated last year which most users felt was a strangely mediocre Mac program turns out to have been partially funded by those sites, and they financially benefit from sales of this software.
You're mad now. You go onto pcworld and in their user feedback forum ask them to address the allegations that has arisen against their site. Your post is civil and contains no profanity. You are instantly banned from the site and your post is deleted. You notice other posts appearing and disappearing just as quickly, all questioning the integrity of that site. You try reddit - and you're instantly banned there too despite your post not breaking any of the site's rules. You notice on Twitter a reddit admin chatting amicably with an employee from pcworld who had just banned you.
Exactly one week later, you discover to your dismay that every single one of the PC sites you visit in addition to certain other tangentially related technology sites have nearly simultaneously run articles with titles like "Windows is Over", "Windows Users are Dead", and "The Death of Windows and the Macs who killed them" filled with nothing but vitriol insulting people who use Windows. They say that you are an "obtuse shit slinger" and are responsible for harassing Mac users everywhere. Some of the journalists who wrote these articles are seen on Twitter threatening Windows developers that if they don't stop making Windows software they'll end their career. Some suggest that Windows users are evil because "Windows users are the source of all malware and viruses." (I shit you not, a Mac fanatic once said that to me)
But you don't hate Macs. You used a Mac in one of your college classes and you never felt that there was anything wrong with them. One of your friends owns only Apple stuff and you get along just fine with him. You also have no issue with people making software exclusively for Macs - it's just not for you. You have no idea why all these sites that once provided quality PC coverage now seemingly hate you. And aren't these journalists supposed to be professionals? Why are they swearing at their audience? Do they seriously not see how disgraceful and juvenile they're acting?
Turns out you're not alone. Countless other Windows users are sick and tired of being insulted by these sites and shamed for their choice in computer operating system, a choice that is shared by the majority of the world. You're sick of these journalists not providing unbiased PC coverage on sites that used to provide you with useful and valuable information. You start to demand ethical reform from the industry, but these sites won't even entertain the conversation. They shut down any conversation while insulting you behind your back.
A similar situation has happened with video games and video game journalism, and this is why I am a proponent of Gamergate.