Kotaku: THIS GAME IS BROKEN. YOU NERFED IT. THE NEW SERVICE SUCKS. I HATE THIS NEW THING. Listen to "fans" of games on the internet and a lot of the time that's what you'll hear. Loud, indignant complaints.
Sometimes, sure, they'll have a point. But other times? They're making noise. Being assholes. And aren't always speaking for a game's entire playerbase.
Developer Dan Cook has written a great article for Gamasutra that, while based on studies of his own games (like this one), sound like they apply across the board to most gaming communities, if not all of them.