It has no realistic approach to teaching people how to play a REAL guitar, it gives kids a false sense of being able to play an instrument, they go and start a crappy band, realize it is indeed crappy, they end up shooting up drugs, get HIV, and die...
All because some ridiculous game.
Me: Which version are they on?
Person 1: 5932!
Me: Oh...can you play the guitar yet?
Person 1: No. ;_;
Gamer: omfg stfu n00b talk to me when you can play Bark at the Moon on expert roflolol
Guitar player: You're gay
Gamer: I kno u r but wut am I roflololmao
Guitar Player: Oh yeah? Well I'd like to see you play Bark at the Moon on a REAL guitar. ::shreds 'Bark at the Moon' flawlessly on his electric guitar::
Gamer: ::overwhelmed by such awesomeness that he explodes and dies::
guitarist: Yeah, too bad a real guitar has 22 frets instead of 5 and 6 strings instead of one. Guitar Hero is for cock smoking fags.
me: Both of you are dumb fucks. Go cut your throats.