I really can't begrudge a guy for continuing to pursue his passion. It's like when Michael Jordan came back and people cried he's ruining his legacy because he's staying around too long and becoming ineffective. Ultimately, it's their legacy. If being able to continue playing is worth more to them than their legacy, who am I to argue. I certainly wouldn't want other people to tell me when it's time to stop pursuing my passion.
That being said, it's the Packers responsibility to do what's best for their team. If Aaron Rodgers career is wasted, to me it either falls on Aaron Rodgers for not being able to beat out Brett Favre, or on the Packers for letting someone else dictate their depth chart and not doing what's right for the team.
The whole salary cap thing is the real travesty. When a player retires, that should be it on his contract. He should no longer get paid, and the team should no longer be on the books for the contract. I'm not sure how much of Favre's contract is from bonuses, so I'm not sure the cap hit GB would be looking at to release him.
Brett is slightly annoying me, not because of his indecision and desire to come back (because as I said, I can't begrudge him for wanting to continue playing), but because I do think he's a little bit of a media whore and a drama queen. I just get the feeling he's doing this more because he misses the spotlight than because he misses actually playing football.