I have read more than plenty in my 41 years, that's why I find your juvenile conspiracy nonsense a bit of an eye roller (I had ideas like that too when I was half the age I am now).
Think, man. Yes, astroturfers exist but why would anyone bother sending them to a fan site for the converted? That's like walking into a mosque and handing out Bibles. A huge waste of time and paper. Have you ever heard of an Apple fan converting FROM Apple to another brand? And in the unlikely event that you did, was it because they had read a couple of negative posts on MacRumors? No.
If you were to send a patrol of astroturfers out there to spread FUD about the iPhone, you'd probably direct them to places where they can stop people from ever becoming Apple customers, and MR or other Mac fansites would be horrible places to do that. Instead you'd send them to places where fans of many brands gather, forums for smartphones in general, article comments on Gizmodo/Engadget etc.
As for the media itself, that's a Mac stronghold. I once went to visit Aftonbladet (Sweden's largest evening paper), they have this giant open office space and it was like staring into an ocean of Macs. Yet they're writing about this antenna issue, just like they write negative stuff about the social democratic party sometimes even though Aftonbladet is attached to that party. We always think the worst of journalists, but you'd be surprised how willing they are to set their own feelings, preferences and biases aside even if it means dissing their favorite brand, band, political party etc. They're not out to nail Apple and they'd happily write the same stuff about Google or Microsoft if they were the ones currently under scrutiny over some product defect.
Instead, consider the possibility that it's perhaps you who want it to be a conspiracy against Apple, because it's comforting to imagine that the people complaining are just faking it, and that in reality, Apple is perfect, loved by everyone and incapable of error.