"Green Day sucks, they should've stopped making music before they started."
"Rock Band sucks, why don't people play real guitars?"
Complain about Green Day's three-chord songs all you want, and while you're at it, don't forget to trash on the Ramones' simple guitar riffs and lack of solos. The way I see it, Green Day has been making quality mainstream rock music for sixteen years. They deserve their success, and if they want to release their own video game, more power to them. Besides, you don't have to listen to the band or play their video game. But still, people whine whine whine.
And here's a newsflash: Rock Band is a video game. It's not an art form (at least, playing it isn't). Playing video games is usually an easy kind of enjoyment you can share with friends, family, or even strangers. Video games let you pretend you're fighting a war, racing a car at 200MPH or rocking the world with bandmates at your sides. Some people don't want to devote time and effort to playing real guitar. They don't want to become the next Hendrix or Slash. They want to have fun. What's wrong with that? I've never heard anyone say, "Why are you wasting your time with Modern Warfare? Why don't you go fight in a real war?" Sounds pretty moronic, doesn't it?
On a related note, I found this quote amusing and a nice change of pace:
"not a green day fan... but more people should play these games instead of playing real instruments and starting really shitty bands."