It's just so fucking cowardly. Back in the old days, Anonymous use to just openly harass people for the cruelty of it (or as they say, for the "lulz"). Using this "we only care about ethics" bullshit as a paper-thin justification for the raid is just sad.
AAA publishers have been manipulating the gaming press for DECADES - it's not a conspiracy theory, that's how the entertainment press works (you run a negative story about Tom Cruise, you don't get to interview him next time). Scores skew high, reviewers are under pressure to play ball. And 4chan didn't give two shits about it until they saw a chance to terrorize a woman - which is one of their favorite pastimes.